6bb73a162c
This removes a large number of hacks from the codebase, speeds up the rendering, and removes tearing when dragging entities.
841 lines
28 KiB
C++
841 lines
28 KiB
C++
//-----------------------------------------------------------------------------
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// OpenGL 1 based rendering interface.
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//
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// Copyright 2016 whitequark
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//-----------------------------------------------------------------------------
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#include "solvespace.h"
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#ifdef WIN32
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// Include after solvespace.h to avoid identifier clashes.
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# include <windows.h> // required by GL headers
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#endif
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#ifdef __APPLE__
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# include <OpenGL/gl.h>
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# include <OpenGL/glu.h>
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#else
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# include <GL/gl.h>
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# include <GL/glu.h>
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#endif
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namespace SolveSpace {
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//-----------------------------------------------------------------------------
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// Checks for buggy OpenGL renderers
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//-----------------------------------------------------------------------------
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// Intel GPUs with Mesa on *nix render thin lines poorly.
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static bool HasIntelThinLineQuirk()
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{
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static bool quirkChecked, quirkEnabled;
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if(!quirkChecked) {
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const char *ident = (const char*)glGetString(GL_VENDOR);
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if(ident != NULL) {
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quirkChecked = true;
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quirkEnabled = !strcmp(ident, "Intel Open Source Technology Center");
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}
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}
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return quirkEnabled;
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}
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// The default Windows GL renderer really does implement GL 1.1,
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// and cannot handle non-power-of-2 textures, which is legal.
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static bool HasGl1V1Quirk()
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{
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static bool quirkChecked, quirkEnabled;
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if(!quirkChecked) {
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const char *ident = (const char*)glGetString(GL_VERSION);
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if(ident != NULL) {
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quirkChecked = true;
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quirkEnabled = !strcmp(ident, "1.1.0");
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}
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}
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return quirkEnabled;
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}
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//-----------------------------------------------------------------------------
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// Thin wrappers around OpenGL functions to fix bugs, adapt them to our
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// data structures, etc.
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//-----------------------------------------------------------------------------
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static inline void ssglNormal3v(Vector n) {
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glNormal3d(n.x, n.y, n.z);
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}
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static inline void ssglVertex3v(Vector v) {
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glVertex3d(v.x, v.y, v.z);
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}
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void ssglLineWidth(double width) {
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if(HasIntelThinLineQuirk() && width < 1.6)
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width = 1.6;
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glLineWidth((GLfloat)width);
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}
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static inline void ssglColorRGBA(RgbaColor color) {
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glColor4d(color.redF(), color.greenF(), color.blueF(), color.alphaF());
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}
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static inline void ssglMaterialRGBA(GLenum side, RgbaColor color) {
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GLfloat mpb[] = { color.redF(), color.greenF(), color.blueF(), color.alphaF() };
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glMaterialfv(side, GL_AMBIENT_AND_DIFFUSE, mpb);
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}
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static void ssglDepthRange(Canvas::Layer layer, int zIndex) {
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switch(layer) {
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case Canvas::Layer::NORMAL:
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case Canvas::Layer::FRONT:
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case Canvas::Layer::BACK:
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glDepthFunc(GL_LEQUAL);
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glDepthMask(GL_TRUE);
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glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
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break;
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case Canvas::Layer::DEPTH_ONLY:
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glDepthFunc(GL_LEQUAL);
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glDepthMask(GL_TRUE);
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glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
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break;
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case Canvas::Layer::OCCLUDED:
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glDepthFunc(GL_GREATER);
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glDepthMask(GL_FALSE);
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glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
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break;
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}
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switch(layer) {
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case Canvas::Layer::FRONT:
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glDepthRange(0.0, 0.0);
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break;
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case Canvas::Layer::BACK:
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glDepthRange(1.0, 1.0);
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break;
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case Canvas::Layer::NORMAL:
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case Canvas::Layer::DEPTH_ONLY:
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case Canvas::Layer::OCCLUDED:
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// The size of this step depends on the resolution of the Z buffer; for
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// a 16-bit buffer, this should be fine.
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double offset = 1.0 / (65535 * 0.8) * zIndex;
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glDepthRange(0.1 - offset, 1.0 - offset);
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break;
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}
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}
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static void ssglFillPattern(Canvas::FillPattern pattern) {
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static bool Init;
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static GLubyte MaskA[(32*32)/8];
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static GLubyte MaskB[(32*32)/8];
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if(!Init) {
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int x, y;
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for(x = 0; x < 32; x++) {
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for(y = 0; y < 32; y++) {
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int i = y*4 + x/8, b = x % 8;
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int ym = y % 4, xm = x % 4;
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for(int k = 0; k < 2; k++) {
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if(xm >= 1 && xm <= 2 && ym >= 1 && ym <= 2) {
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(k == 0 ? MaskB : MaskA)[i] |= (0x80 >> b);
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}
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ym = (ym + 2) % 4; xm = (xm + 2) % 4;
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}
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}
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}
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Init = true;
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}
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switch(pattern) {
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case Canvas::FillPattern::SOLID:
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glDisable(GL_POLYGON_STIPPLE);
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break;
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case Canvas::FillPattern::CHECKERED_A:
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glEnable(GL_POLYGON_STIPPLE);
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glPolygonStipple(MaskA);
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break;
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case Canvas::FillPattern::CHECKERED_B:
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glEnable(GL_POLYGON_STIPPLE);
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glPolygonStipple(MaskB);
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break;
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}
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}
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//-----------------------------------------------------------------------------
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// OpenGL 1 / compatibility profile based renderer
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//-----------------------------------------------------------------------------
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class OpenGl1Renderer : public ViewportCanvas {
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public:
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Camera camera;
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Lighting lighting;
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// Cached OpenGL state.
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struct {
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bool drawing;
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GLenum mode;
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hStroke hcs;
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Stroke *stroke;
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hFill hcf;
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Fill *fill;
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std::weak_ptr<const Pixmap> texture;
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} current;
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OpenGl1Renderer() : camera(), lighting(), current() {}
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const Camera &GetCamera() const override { return camera; }
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void DrawLine(const Vector &a, const Vector &b, hStroke hcs) override;
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void DrawEdges(const SEdgeList &el, hStroke hcs) override;
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bool DrawBeziers(const SBezierList &bl, hStroke hcs) override { return false; }
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void DrawOutlines(const SOutlineList &ol, hStroke hcs, DrawOutlinesAs drawAs) override;
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void DrawVectorText(const std::string &text, double height,
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const Vector &o, const Vector &u, const Vector &v,
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hStroke hcs) override;
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void DrawQuad(const Vector &a, const Vector &b, const Vector &c, const Vector &d,
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hFill hcf) override;
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void DrawPoint(const Vector &o, hStroke hcs) override;
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void DrawPolygon(const SPolygon &p, hFill hcf) override;
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void DrawMesh(const SMesh &m, hFill hcfFront, hFill hcfBack) override;
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void DrawFaces(const SMesh &m, const std::vector<uint32_t> &faces, hFill hcf) override;
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void DrawPixmap(std::shared_ptr<const Pixmap> pm,
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const Vector &o, const Vector &u, const Vector &v,
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const Point2d &ta, const Point2d &tb, hFill hcf) override;
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void InvalidatePixmap(std::shared_ptr<const Pixmap> pm) override;
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void SelectPrimitive(unsigned mode);
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void UnSelectPrimitive();
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Stroke *SelectStroke(hStroke hcs);
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Fill *SelectFill(hFill hcf);
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void SelectTexture(std::shared_ptr<const Pixmap> pm);
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void DoFatLineEndcap(const Vector &p, const Vector &u, const Vector &v);
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void DoFatLine(const Vector &a, const Vector &b, double width);
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void DoLine(const Vector &a, const Vector &b, hStroke hcs);
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void DoPoint(Vector p, double radius);
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void DoStippledLine(const Vector &a, const Vector &b, hStroke hcs, double phase = 0.0);
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void UpdateProjection();
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void SetCamera(const Camera &camera) override;
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void SetLighting(const Lighting &lighting) override;
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void NewFrame() override;
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void FlushFrame() override;
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std::shared_ptr<Pixmap> ReadFrame() override;
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void GetIdent(const char **vendor, const char **renderer, const char **version) override;
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};
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//-----------------------------------------------------------------------------
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// A simple OpenGL state tracker to group consecutive draw calls.
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//-----------------------------------------------------------------------------
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void OpenGl1Renderer::SelectPrimitive(GLenum mode) {
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if(current.drawing && current.mode == mode) {
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return;
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} else if(current.drawing) {
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glEnd();
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}
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glBegin(mode);
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current.drawing = true;
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current.mode = mode;
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}
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void OpenGl1Renderer::UnSelectPrimitive() {
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if(!current.drawing) return;
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glEnd();
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current.drawing = false;
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}
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Canvas::Stroke *OpenGl1Renderer::SelectStroke(hStroke hcs) {
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if(current.hcs.v == hcs.v) return current.stroke;
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Stroke *stroke = strokes.FindById(hcs);
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UnSelectPrimitive();
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ssglColorRGBA(stroke->color);
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ssglDepthRange(stroke->layer, stroke->zIndex);
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ssglLineWidth(stroke->WidthPx(camera));
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// Fat lines and points are quads affected by glPolygonStipple, so make sure
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// they are displayed correctly.
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ssglFillPattern(FillPattern::SOLID);
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glDisable(GL_TEXTURE_2D);
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current.hcs = hcs;
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current.stroke = stroke;
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current.hcf = {};
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current.fill = NULL;
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current.texture.reset();
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return stroke;
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}
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Canvas::Fill *OpenGl1Renderer::SelectFill(hFill hcf) {
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if(current.hcf.v == hcf.v) return current.fill;
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Fill *fill = fills.FindById(hcf);
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UnSelectPrimitive();
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ssglColorRGBA(fill->color);
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ssglDepthRange(fill->layer, fill->zIndex);
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ssglFillPattern(fill->pattern);
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glDisable(GL_TEXTURE_2D);
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current.hcs = {};
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current.stroke = NULL;
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current.hcf = hcf;
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current.fill = fill;
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current.texture.reset();
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return fill;
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}
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static int RoundUpToPowerOfTwo(int v)
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{
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for(int i = 0; i < 31; i++) {
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int vt = (1 << i);
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if(vt >= v) {
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return vt;
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}
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}
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return 0;
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}
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void OpenGl1Renderer::SelectTexture(std::shared_ptr<const Pixmap> pm) {
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if(current.texture.lock() == pm) return;
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glBindTexture(GL_TEXTURE_2D, 1);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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GLenum format = 0;
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switch(pm->format) {
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case Pixmap::Format::RGBA: format = GL_RGBA; break;
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case Pixmap::Format::RGB: format = GL_RGB; break;
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case Pixmap::Format::A: format = GL_ALPHA; break;
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case Pixmap::Format::BGRA:
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case Pixmap::Format::BGR:
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ssassert(false, "Unexpected pixmap format");
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}
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if(!HasGl1V1Quirk()) {
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glTexImage2D(GL_TEXTURE_2D, 0, format, pm->width, pm->height, 0,
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format, GL_UNSIGNED_BYTE, &pm->data[0]);
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} else {
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GLsizei width = RoundUpToPowerOfTwo(pm->width);
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GLsizei height = RoundUpToPowerOfTwo(pm->height);
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glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0,
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format, GL_UNSIGNED_BYTE, 0);
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, pm->width, pm->height,
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format, GL_UNSIGNED_BYTE, &pm->data[0]);
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}
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glEnable(GL_TEXTURE_2D);
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current.texture = pm;
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}
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//-----------------------------------------------------------------------------
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// OpenGL's GL_LINES mode does not work on lines thicker than about 3 px,
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// so we have to draw thicker lines using triangles.
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//-----------------------------------------------------------------------------
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void OpenGl1Renderer::DoFatLineEndcap(const Vector &p, const Vector &u, const Vector &v) {
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// A table of cos and sin of (pi*i/10 + pi/2), as i goes from 0 to 10
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static const double Circle[11][2] = {
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{ 0.0000, 1.0000 },
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{ -0.3090, 0.9511 },
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{ -0.5878, 0.8090 },
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{ -0.8090, 0.5878 },
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{ -0.9511, 0.3090 },
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{ -1.0000, 0.0000 },
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{ -0.9511, -0.3090 },
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{ -0.8090, -0.5878 },
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{ -0.5878, -0.8090 },
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{ -0.3090, -0.9511 },
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{ 0.0000, -1.0000 },
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};
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SelectPrimitive(GL_TRIANGLE_FAN);
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for(auto pc : Circle) {
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double c = pc[0], s = pc[1];
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ssglVertex3v(p.Plus(u.ScaledBy(c)).Plus(v.ScaledBy(s)));
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}
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UnSelectPrimitive();
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}
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void OpenGl1Renderer::DoFatLine(const Vector &a, const Vector &b, double width) {
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// The half-width of the line we're drawing.
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double hw = width / 2;
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Vector ab = b.Minus(a);
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Vector gn = (camera.projRight).Cross(camera.projUp);
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Vector abn = (ab.Cross(gn)).WithMagnitude(1);
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abn = abn.Minus(gn.ScaledBy(gn.Dot(abn)));
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// So now abn is normal to the projection of ab into the screen, so the
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// line will always have constant thickness as the view is rotated.
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abn = abn.WithMagnitude(hw);
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ab = gn.Cross(abn);
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ab = ab. WithMagnitude(hw);
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// The body of a line is a quad
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SelectPrimitive(GL_QUADS);
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ssglVertex3v(a.Plus (abn));
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ssglVertex3v(b.Plus (abn));
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ssglVertex3v(b.Minus(abn));
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ssglVertex3v(a.Minus(abn));
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// And the line has two semi-circular end caps.
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DoFatLineEndcap(a, ab, abn);
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DoFatLineEndcap(b, ab.ScaledBy(-1), abn);
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}
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void OpenGl1Renderer::DoLine(const Vector &a, const Vector &b, hStroke hcs) {
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if(a.Equals(b)) return;
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Stroke *stroke = SelectStroke(hcs);
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if(stroke->WidthPx(camera) <= 3.0) {
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SelectPrimitive(GL_LINES);
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ssglVertex3v(a);
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ssglVertex3v(b);
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} else {
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DoFatLine(a, b, stroke->WidthPx(camera) / camera.scale);
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}
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}
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void OpenGl1Renderer::DoPoint(Vector p, double d) {
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if(d <= 3.0) {
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Vector u = camera.projRight.WithMagnitude(d / 2.0 / camera.scale);
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SelectPrimitive(GL_LINES);
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ssglVertex3v(p.Minus(u));
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ssglVertex3v(p.Plus(u));
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} else {
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Vector u = camera.projRight.WithMagnitude(d / 2.0 / camera.scale);
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Vector v = camera.projUp.WithMagnitude(d / 2.0 / camera.scale);
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DoFatLineEndcap(p, u, v);
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DoFatLineEndcap(p, u.ScaledBy(-1.0), v);
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}
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}
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void OpenGl1Renderer::DoStippledLine(const Vector &a, const Vector &b, hStroke hcs, double phase) {
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Stroke *stroke = SelectStroke(hcs);
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if(stroke->stipplePattern == StipplePattern::CONTINUOUS) {
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DoLine(a, b, hcs);
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return;
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}
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double scale = stroke->StippleScaleMm(camera);
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const std::vector<double> &dashes = StipplePatternDashes(stroke->stipplePattern);
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double length = StipplePatternLength(stroke->stipplePattern) * scale;
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phase -= floor(phase / length) * length;
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double curPhase = 0.0;
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size_t curDash;
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for(curDash = 0; curDash < dashes.size(); curDash++) {
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curPhase += dashes[curDash] * scale;
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if(phase < curPhase) break;
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}
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Vector dir = b.Minus(a);
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double len = dir.Magnitude();
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dir = dir.WithMagnitude(1.0);
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double cur = 0.0;
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Vector curPos = a;
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double width = stroke->WidthMm(camera);
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double curDashLen = (curPhase - phase) / scale;
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while(cur < len) {
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double next = std::min(len, cur + curDashLen * scale);
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Vector nextPos = curPos.Plus(dir.ScaledBy(next - cur));
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if(curDash % 2 == 0) {
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if(curDashLen <= LENGTH_EPS) {
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DoPoint(curPos, width);
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} else {
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DoLine(curPos, nextPos, hcs);
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}
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}
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cur = next;
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curPos = nextPos;
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curDash++;
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curDashLen = dashes[curDash % dashes.size()];
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}
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}
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//-----------------------------------------------------------------------------
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// A canvas implemented using OpenGL 2 immediate mode.
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//-----------------------------------------------------------------------------
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void OpenGl1Renderer::DrawLine(const Vector &a, const Vector &b, hStroke hcs) {
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DoStippledLine(a, b, hcs);
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}
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void OpenGl1Renderer::DrawEdges(const SEdgeList &el, hStroke hcs) {
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double phase = 0.0;
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for(const SEdge *e = el.l.First(); e; e = el.l.NextAfter(e)) {
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DoStippledLine(e->a, e->b, hcs, phase);
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phase += e->a.Minus(e->b).Magnitude();
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}
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}
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void OpenGl1Renderer::DrawOutlines(const SOutlineList &ol, hStroke hcs, DrawOutlinesAs drawAs) {
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Vector projDir = camera.projRight.Cross(camera.projUp);
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double phase = 0.0;
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switch(drawAs) {
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case DrawOutlinesAs::EMPHASIZED_AND_CONTOUR:
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for(const SOutline &o : ol.l) {
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if(o.IsVisible(projDir) || o.tag != 0) {
|
|
DoStippledLine(o.a, o.b, hcs, phase);
|
|
}
|
|
phase += o.a.Minus(o.b).Magnitude();
|
|
}
|
|
break;
|
|
|
|
case DrawOutlinesAs::EMPHASIZED_WITHOUT_CONTOUR:
|
|
for(const SOutline &o : ol.l) {
|
|
if(!o.IsVisible(projDir) && o.tag != 0) {
|
|
DoStippledLine(o.a, o.b, hcs, phase);
|
|
}
|
|
phase += o.a.Minus(o.b).Magnitude();
|
|
}
|
|
break;
|
|
|
|
case DrawOutlinesAs::CONTOUR_ONLY:
|
|
for(const SOutline &o : ol.l) {
|
|
if(o.IsVisible(projDir)) {
|
|
DoStippledLine(o.a, o.b, hcs, phase);
|
|
}
|
|
phase += o.a.Minus(o.b).Magnitude();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawVectorText(const std::string &text, double height,
|
|
const Vector &o, const Vector &u, const Vector &v,
|
|
hStroke hcs) {
|
|
auto traceEdge = [&](Vector a, Vector b) { DoStippledLine(a, b, hcs); };
|
|
VectorFont::Builtin()->Trace(height, o, u, v, text, traceEdge, camera);
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawQuad(const Vector &a, const Vector &b, const Vector &c, const Vector &d,
|
|
hFill hcf) {
|
|
SelectFill(hcf);
|
|
SelectPrimitive(GL_QUADS);
|
|
ssglVertex3v(a);
|
|
ssglVertex3v(b);
|
|
ssglVertex3v(c);
|
|
ssglVertex3v(d);
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawPoint(const Vector &o, Canvas::hStroke hcs) {
|
|
Stroke *stroke = SelectStroke(hcs);
|
|
|
|
Canvas::Fill fill = {};
|
|
fill.layer = stroke->layer;
|
|
fill.zIndex = stroke->zIndex;
|
|
fill.color = stroke->color;
|
|
hFill hcf = GetFill(fill);
|
|
|
|
Vector r = camera.projRight.ScaledBy(stroke->width/2.0/camera.scale);
|
|
Vector u = camera.projUp.ScaledBy(stroke->width/2.0/camera.scale);
|
|
Vector a = o.Plus (r).Plus (u),
|
|
b = o.Plus (r).Minus(u),
|
|
c = o.Minus(r).Minus(u),
|
|
d = o.Minus(r).Plus (u);
|
|
DrawQuad(a, b, c, d, hcf);
|
|
}
|
|
|
|
#ifdef WIN32
|
|
#define SSGL_CALLBACK CALLBACK
|
|
#else
|
|
#define SSGL_CALLBACK
|
|
#endif
|
|
typedef void(SSGL_CALLBACK *GLUCallback)();
|
|
|
|
static void SSGL_CALLBACK Vertex(Vector *p) {
|
|
ssglVertex3v(*p);
|
|
}
|
|
static void SSGL_CALLBACK Combine(double coords[3], void *vertexData[4],
|
|
float weight[4], void **outData) {
|
|
Vector *n = (Vector *)AllocTemporary(sizeof(Vector));
|
|
n->x = coords[0];
|
|
n->y = coords[1];
|
|
n->z = coords[2];
|
|
|
|
*outData = n;
|
|
}
|
|
void OpenGl1Renderer::DrawPolygon(const SPolygon &p, hFill hcf) {
|
|
UnSelectPrimitive();
|
|
SelectFill(hcf);
|
|
|
|
GLUtesselator *gt = gluNewTess();
|
|
gluTessCallback(gt, GLU_TESS_BEGIN, (GLUCallback) glBegin);
|
|
gluTessCallback(gt, GLU_TESS_VERTEX, (GLUCallback) Vertex);
|
|
gluTessCallback(gt, GLU_TESS_END, (GLUCallback) glEnd);
|
|
gluTessCallback(gt, GLU_TESS_COMBINE, (GLUCallback) Combine);
|
|
|
|
gluTessProperty(gt, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_ODD);
|
|
|
|
ssglNormal3v(p.normal);
|
|
gluTessNormal(gt, p.normal.x, p.normal.y, p.normal.z);
|
|
|
|
gluTessBeginPolygon(gt, NULL);
|
|
for(const SContour &sc : p.l) {
|
|
gluTessBeginContour(gt);
|
|
for(const SPoint &sp : sc.l) {
|
|
double ap[3] = { sp.p.x, sp.p.y, sp.p.z };
|
|
gluTessVertex(gt, ap, (GLvoid *) &sp.p);
|
|
}
|
|
gluTessEndContour(gt);
|
|
}
|
|
gluTessEndPolygon(gt);
|
|
|
|
gluDeleteTess(gt);
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawMesh(const SMesh &m, hFill hcfFront, hFill hcfBack) {
|
|
UnSelectPrimitive();
|
|
|
|
RgbaColor frontColor = {},
|
|
backColor = {};
|
|
|
|
Fill *frontFill = SelectFill(hcfFront);
|
|
frontColor = frontFill->color;
|
|
|
|
ssglMaterialRGBA(GL_FRONT, frontFill->color);
|
|
if(hcfBack.v != 0) {
|
|
Fill *backFill = fills.FindById(hcfBack);
|
|
backColor = backFill->color;
|
|
ssassert(frontFill->layer == backFill->layer &&
|
|
frontFill->zIndex == backFill->zIndex,
|
|
"frontFill and backFill should belong to the same depth range");
|
|
ssassert(frontFill->pattern == backFill->pattern,
|
|
"frontFill and backFill should have the same pattern");
|
|
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1);
|
|
ssglMaterialRGBA(GL_BACK, backFill->color);
|
|
} else {
|
|
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 0);
|
|
}
|
|
|
|
RgbaColor triangleColor = {};
|
|
glEnable(GL_LIGHTING);
|
|
glBegin(GL_TRIANGLES);
|
|
for(const STriangle &tr : m.l) {
|
|
if(frontColor.IsEmpty() || backColor.IsEmpty()) {
|
|
if(triangleColor.IsEmpty() || !triangleColor.Equals(tr.meta.color)) {
|
|
triangleColor = tr.meta.color;
|
|
if(frontColor.IsEmpty()) {
|
|
ssglMaterialRGBA(GL_FRONT, triangleColor);
|
|
}
|
|
if(backColor.IsEmpty()) {
|
|
ssglMaterialRGBA(GL_BACK, triangleColor);
|
|
}
|
|
}
|
|
}
|
|
|
|
if(tr.an.EqualsExactly(Vector::From(0, 0, 0))) {
|
|
// Compute the normal from the vertices
|
|
ssglNormal3v(tr.Normal());
|
|
ssglVertex3v(tr.a);
|
|
ssglVertex3v(tr.b);
|
|
ssglVertex3v(tr.c);
|
|
} else {
|
|
// Use the exact normals that are specified
|
|
ssglNormal3v(tr.an);
|
|
ssglVertex3v(tr.a);
|
|
ssglNormal3v(tr.bn);
|
|
ssglVertex3v(tr.b);
|
|
ssglNormal3v(tr.cn);
|
|
ssglVertex3v(tr.c);
|
|
}
|
|
}
|
|
glEnd();
|
|
glDisable(GL_LIGHTING);
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawFaces(const SMesh &m, const std::vector<uint32_t> &faces, hFill hcf) {
|
|
SelectFill(hcf);
|
|
SelectPrimitive(GL_TRIANGLES);
|
|
size_t facesSize = faces.size();
|
|
for(const STriangle &tr : m.l) {
|
|
uint32_t face = tr.meta.face;
|
|
for(size_t j = 0; j < facesSize; j++) {
|
|
if(faces[j] != face) continue;
|
|
ssglVertex3v(tr.a);
|
|
ssglVertex3v(tr.b);
|
|
ssglVertex3v(tr.c);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void OpenGl1Renderer::DrawPixmap(std::shared_ptr<const Pixmap> pm,
|
|
const Vector &o, const Vector &u, const Vector &v,
|
|
const Point2d &ta, const Point2d &tb, hFill hcf) {
|
|
double xfactor = 1.0,
|
|
yfactor = 1.0;
|
|
if(HasGl1V1Quirk()) {
|
|
xfactor = (double)pm->width / RoundUpToPowerOfTwo(pm->width);
|
|
yfactor = (double)pm->height / RoundUpToPowerOfTwo(pm->height);
|
|
}
|
|
|
|
UnSelectPrimitive();
|
|
SelectFill(hcf);
|
|
SelectTexture(pm);
|
|
SelectPrimitive(GL_QUADS);
|
|
glTexCoord2d(ta.x * xfactor, ta.y * yfactor);
|
|
ssglVertex3v(o);
|
|
glTexCoord2d(ta.x * xfactor, tb.y * yfactor);
|
|
ssglVertex3v(o.Plus(v));
|
|
glTexCoord2d(tb.x * xfactor, tb.y * yfactor);
|
|
ssglVertex3v(o.Plus(u).Plus(v));
|
|
glTexCoord2d(tb.x * xfactor, ta.y * yfactor);
|
|
ssglVertex3v(o.Plus(u));
|
|
}
|
|
|
|
void OpenGl1Renderer::InvalidatePixmap(std::shared_ptr<const Pixmap> pm) {
|
|
if(current.texture.lock() == pm) {
|
|
current.texture.reset();
|
|
}
|
|
}
|
|
|
|
void OpenGl1Renderer::UpdateProjection() {
|
|
UnSelectPrimitive();
|
|
|
|
glViewport(0, 0, camera.width, camera.height);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
|
|
glScaled(camera.scale * 2.0 / camera.width,
|
|
camera.scale * 2.0 / camera.height,
|
|
camera.scale * 1.0 / 30000);
|
|
|
|
double mat[16];
|
|
// Last thing before display is to apply the perspective
|
|
double clp = camera.tangent * camera.scale;
|
|
MakeMatrix(mat, 1, 0, 0, 0,
|
|
0, 1, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, clp, 1);
|
|
glMultMatrixd(mat);
|
|
|
|
// Before that, we apply the rotation
|
|
Vector projRight = camera.projRight,
|
|
projUp = camera.projUp,
|
|
n = camera.projUp.Cross(camera.projRight);
|
|
MakeMatrix(mat, projRight.x, projRight.y, projRight.z, 0,
|
|
projUp.x, projUp.y, projUp.z, 0,
|
|
n.x, n.y, n.z, 0,
|
|
0, 0, 0, 1);
|
|
glMultMatrixd(mat);
|
|
|
|
// And before that, the translation
|
|
Vector offset = camera.offset;
|
|
MakeMatrix(mat, 1, 0, 0, offset.x,
|
|
0, 1, 0, offset.y,
|
|
0, 0, 1, offset.z,
|
|
0, 0, 0, 1);
|
|
glMultMatrixd(mat);
|
|
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
glClearDepth(1.0);
|
|
glClear(GL_DEPTH_BUFFER_BIT);
|
|
}
|
|
|
|
void OpenGl1Renderer::NewFrame() {
|
|
glEnable(GL_NORMALIZE);
|
|
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
glEnable(GL_BLEND);
|
|
|
|
glEnable(GL_LINE_SMOOTH);
|
|
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
|
|
// don't enable GL_POLYGON_SMOOTH; that looks ugly on some graphics cards,
|
|
// drawn with leaks in the mesh
|
|
|
|
glDepthFunc(GL_LEQUAL);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
if(EXACT(lighting.lightIntensity[0] != 0.0)) {
|
|
glEnable(GL_LIGHT0);
|
|
GLfloat f = (GLfloat)lighting.lightIntensity[0];
|
|
GLfloat li0[] = { f, f, f, 1.0f };
|
|
glLightfv(GL_LIGHT0, GL_DIFFUSE, li0);
|
|
glLightfv(GL_LIGHT0, GL_SPECULAR, li0);
|
|
|
|
Vector ld = camera.VectorFromProjs(lighting.lightDirection[0]);
|
|
GLfloat ld0[4] = { (GLfloat)ld.x, (GLfloat)ld.y, (GLfloat)ld.z, 0 };
|
|
glLightfv(GL_LIGHT0, GL_POSITION, ld0);
|
|
}
|
|
|
|
if(EXACT(lighting.lightIntensity[1] != 0.0)) {
|
|
glEnable(GL_LIGHT1);
|
|
GLfloat f = (GLfloat)lighting.lightIntensity[1];
|
|
GLfloat li0[] = { f, f, f, 1.0f };
|
|
glLightfv(GL_LIGHT1, GL_DIFFUSE, li0);
|
|
glLightfv(GL_LIGHT1, GL_SPECULAR, li0);
|
|
|
|
Vector ld = camera.VectorFromProjs(lighting.lightDirection[1]);
|
|
GLfloat ld0[4] = { (GLfloat)ld.x, (GLfloat)ld.y, (GLfloat)ld.z, 0 };
|
|
glLightfv(GL_LIGHT1, GL_POSITION, ld0);
|
|
}
|
|
|
|
if(EXACT(lighting.ambientIntensity != 0.0)) {
|
|
GLfloat ambient[4] = { (float)lighting.ambientIntensity,
|
|
(float)lighting.ambientIntensity,
|
|
(float)lighting.ambientIntensity, 1 };
|
|
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient);
|
|
}
|
|
|
|
glClearColor(lighting.backgroundColor.redF(), lighting.backgroundColor.greenF(),
|
|
lighting.backgroundColor.blueF(), lighting.backgroundColor.alphaF());
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glClearDepth(1.0);
|
|
glClear(GL_DEPTH_BUFFER_BIT);
|
|
}
|
|
|
|
void OpenGl1Renderer::FlushFrame() {
|
|
UnSelectPrimitive();
|
|
glFlush();
|
|
|
|
GLenum error = glGetError();
|
|
if(error != GL_NO_ERROR) {
|
|
dbp("glGetError() == 0x%X %s", error, gluErrorString(error));
|
|
}
|
|
}
|
|
|
|
std::shared_ptr<Pixmap> OpenGl1Renderer::ReadFrame() {
|
|
std::shared_ptr<Pixmap> pixmap =
|
|
Pixmap::Create(Pixmap::Format::RGB, (size_t)camera.width, (size_t)camera.height);
|
|
glReadPixels(0, 0, camera.width, camera.height, GL_RGB, GL_UNSIGNED_BYTE, &pixmap->data[0]);
|
|
return pixmap;
|
|
}
|
|
|
|
void OpenGl1Renderer::GetIdent(const char **vendor, const char **renderer, const char **version) {
|
|
*vendor = (const char *)glGetString(GL_VENDOR);
|
|
*renderer = (const char *)glGetString(GL_RENDERER);
|
|
*version = (const char *)glGetString(GL_VERSION);
|
|
}
|
|
|
|
void OpenGl1Renderer::SetCamera(const Camera &c) {
|
|
camera = c;
|
|
UpdateProjection();
|
|
}
|
|
|
|
void OpenGl1Renderer::SetLighting(const Lighting &l) {
|
|
lighting = l;
|
|
}
|
|
|
|
std::shared_ptr<ViewportCanvas> CreateRenderer() {
|
|
return std::shared_ptr<ViewportCanvas>(new OpenGl1Renderer());
|
|
}
|
|
|
|
}
|