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/*****
* beziercurve.h
* Author: John C. Bowman
*
* Render a Bezier curve.
*****/
#ifndef BEZIERCURVE_H
#define BEZIERCURVE_H
#include "drawelement.h"
namespace camp {
#ifdef HAVE_GL
extern const double Fuzz;
extern const double Fuzz2;
struct BezierCurve
{
vertexBuffer data;
double res,res2;
bool Onscreen;
void init(double res);
// Approximate bounds by bounding box of control polyhedron.
bool offscreen(size_t n, const triple *v) {
if(bbox2(n,v).offscreen()) {
Onscreen=false;
return true;
}
return false;
}
void render(const triple *p, bool straight);
void render(const triple *p, GLuint I0, GLuint I1);
void append() {
material1Data.append(data);
}
void notRendered() {
material1Data.rendered=false;
}
void queue(const triple *g, bool straight, double ratio) {
data.clear();
notRendered();
Onscreen=true;
init(pixel*ratio);
render(g,straight);
}
};
struct Pixel
{
vertexBuffer data;
void append() {
material0Data.append0(data);
}
void queue(const triple& p, double width) {
data.clear();
MaterialIndex=materialIndex;
data.indices.push_back(data.vertex0(p,width));
append();
}
void draw();
};
#endif
} //namespace camp
#endif
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