094e10204d
the plane basis vectors) work, easy. Tweak the text window a bit, for cosmetics, and start to add the symbolic expression code. [git-p4: depot-paths = "//depot/solvespace/": change = 1667]
47 lines
1.1 KiB
C++
47 lines
1.1 KiB
C++
#include "solvespace.h"
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Expr *Expr::FromParam(hParam p) {
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Expr *r = AllocExpr();
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r->op = PARAM;
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r->x.parh = p;
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return r;
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}
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Expr *Expr::FromConstant(double v) {
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Expr *r = AllocExpr();
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r->op = CONSTANT;
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r->x.v = v;
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return r;
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}
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Expr *Expr::AnyOp(int newOp, Expr *b) {
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Expr *r = AllocExpr();
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r->op = newOp;
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r->a = this;
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r->b = b;
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return r;
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}
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double Expr::Eval(void) {
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switch(op) {
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case PARAM: return SS.GetParam(x.parh)->val;
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case PARAM_PTR: return (x.parp)->val;
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case CONSTANT: return x.v;
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case PLUS: return a->Eval() + b->Eval();
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case MINUS: return a->Eval() - b->Eval();
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case TIMES: return a->Eval() * b->Eval();
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case DIV: return a->Eval() / b->Eval();
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case NEGATE: return -(a->Eval());
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case SQRT: return sqrt(a->Eval());
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case SQUARE: { double r = a->Eval(); return r*r; }
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case SIN: return sin(a->Eval());
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case COS: return cos(a->Eval());
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default: oops();
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}
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}
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