LineFieldRenderer::LineFieldRenderer(const Manifold& m, bool smooth, VertexAttributeVector<Vec3d>& lines, float _r):
SimpleShaderRenderer(vss,fss), r(_r)
{
float noise_scale = 10.0f/r;
float line_scale = 0.003f;
GLint old_prog;
glGetIntegerv(GL_CURRENT_PROGRAM, &old_prog);
glUseProgram(prog);
glUniform1fARB(glGetUniformLocationARB(prog, "scale_line"),line_scale*noise_scale);
glUniform1fARB(glGetUniformLocationARB(prog, "noise_scale"),noise_scale);
glUniform1iARB(glGetUniformLocationARB(prog, "noise_tex"),0);
GLuint direction = glGetAttribLocation(prog, "direction");
glNewList(display_list,GL_COMPILE);
for(FaceIDIterator f = m.faces_begin(); f != m.faces_end(); ++f) {
if(!smooth)
glNormal3dv(normal(m, *f).get());
if(no_edges(m, *f) == 3)
glBegin(GL_TRIANGLES);
else
glBegin(GL_POLYGON);
for(Walker w = m.walker(*f); !w.full_circle(); w = w.circulate_face_ccw()) {
Vec3d n(normal(m, w.vertex()));
if(smooth)
glNormal3dv(n.get());
Vec3d d = lines[w.vertex()];
d = normalize(d-n*dot(n,d));
glVertexAttrib3dv(direction, d.get());
glVertex3dv(m.pos(w.vertex()).get());
}
glEnd();
}
glBindTexture(GL_TEXTURE_3D, 0);
glEndList();
glUseProgram(old_prog);
}
