+++ /dev/null
-#include <cmath>
-#include "capsule.h"
-#include "primitivebuilder.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-CapsuleBuilder::CapsuleBuilder(float r, float l, unsigned s, unsigned n):
- radius(r),
- length(l),
- segments(s),
- rings(n)
-{
- if(segments<3)
- segments = 3;
- rings |= 1;
- if(rings<3)
- rings = 3;
-}
-
-void CapsuleBuilder::build(PrimitiveBuilder &builder) const
-{
- float u_scale = 1.0/segments;
- float v_scale = 1/(length+radius*M_PI);
- adjust_texture_scale(u_scale, v_scale, radius*M_PI*2, length+radius*M_PI);
-
- builder.normal(0, 0, -1);
- builder.texcoord(0.5, 0);
- builder.vertex(0, 0, -length/2-radius);
- for(unsigned i=1; i<rings; ++i)
- {
- float cz = length*(i>rings/2 ? 0.5 : -0.5);
- float v = ((i>rings/2 ? i-1 : i)*radius*M_PI/(rings-1)+(i>rings/2 ? length : 0))*v_scale;
- float ra = (i>rings/2 ? i-1 : i)*M_PI/(rings-1);
- float rc = cos(ra);
- float rs = sin(ra);
- for(unsigned j=0; j<=segments; ++j)
- {
- float sa = j*M_PI*2/segments;
- float sc = cos(sa);
- float ss = sin(sa);
- builder.normal(rs*sc, rs*ss, -rc);
- if(tangent_attr>=0)
- builder.attrib(tangent_attr, -ss, sc, 0);
- if(binormal_attr>=0)
- builder.attrib(binormal_attr, rc*sc, rc*ss, rs);
- builder.texcoord(j*u_scale, v);
- builder.vertex(rs*sc*radius, rs*ss*radius, cz-rc*radius);
- }
- }
- builder.normal(0, 0, 1);
- builder.texcoord(0.5, (length+radius*M_PI)*v_scale);
- builder.vertex(0, 0, length/2+radius);
-
- for(unsigned i=0; i<segments; ++i)
- {
- builder.begin(GL::TRIANGLE_STRIP);
- builder.element(0);
- for(unsigned j=0; j+1<rings; ++j)
- {
- builder.element(1+j*(segments+1)+i+1);
- builder.element(1+j*(segments+1)+i);
- }
- builder.element((segments+1)*(rings-1)+1);
- builder.end();
- }
-}
-
-} // namespace GL
-} // namespace Msp