63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
#include "all_includes.hh"
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// Triangle "rapide", sert juste aux calculs de coordonnées. Devrait
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// être une superclasse de "triangle". Pour calculer le cosinus
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// d'angles, on crée un objet triangle assez gros. C'est du
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// gaspillage.
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Triangle::Triangle() {
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}
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Triangle::Triangle(Vertex v1, Vertex v2, Vertex v3): v1(v1), v2(v2), v3(v3) {
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}
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Triangle::Triangle(Vertex v1, Vertex v2, Vertex v3, unsigned char r, unsigned char g, unsigned char b)
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: v1(v1), v2(v2), v3(v3), r(r), g(g), b(b), vnormal(normal(v1,v2,v3)) {
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}
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Vertex Triangle::normal(Vertex v1, Vertex v2, Vertex v3) {
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Vertex normal = (v1 - v2)*(v2 - v3);
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return normal / normal.norm();
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}
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float Triangle::cosAngle() {
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return (v1-v2).cosAngle(v3-v2);
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}
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float Triangle::angle() {
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return std::acos(cosAngle());
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}
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float Triangle::minAngle() {
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float a2 = angle();
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float a3 = Triangle(v2,v3,v1).angle();
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float a1 = Angle::Pi - a2 - a3;
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return std::min(std::min(a1, a2), a3);
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}
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void Triangle::offsetBase(int offset) {
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Quad q = Quad(v2, v1, v3, v2);
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q.offset(S, -offset);
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v1 = q.corner[1];
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v2 = q.corner[0];
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v3 = q.corner[2];
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}
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void Triangle::display() {
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// glDisable(GL_LIGHTING);
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// glDisable(GL_TEXTURE_2D);
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// glBegin(GL_LINES);
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// glColor3ub(255,255,0);
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// Vertex v = (v1 + v2 + v3) / 3;
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// glVertex3d(v.x,v.y,v.z);
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// glVertex3d(v.x+vnormal.x*50,v.y+vnormal.y*50,v.z+vnormal.z*50);
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// glEnd( );
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// glEnable(GL_LIGHTING);
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View::setColor(r,g,b);
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glNormal3d(vnormal.x,vnormal.y,vnormal.z);
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// glBegin(GL_TRIANGLES);
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glVertex3d(v1.x,v1.y,v1.z);
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glVertex3d(v2.x,v2.y,v2.z);
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glVertex3d(v3.x,v3.y,v3.z);
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// glEnd();
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}
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