void sprite_draw(struct sprite* s, float cx, float cy, float angle)
{
float w2 = s->width/2;
float h2 = s->height/2;
int i;
float sint = sin(torad(angle));
float cost = cos(torad(angle));
struct matrix2d rotation = { {
{cost, -sint},
{sint, cost} }};
struct vector2d v[4] = { {{-w2, -h2}}, {{-w2, h2}}, {{w2, h2}}, {{w2,-h2}} };
for(i=0; i<4;i++)
{
v[i] = matrix_vec_mult(rotation.m, v[i].vec);
}
for(i=0; i<4;i++)
{
v[i].vec[0] += cx;
v[i].vec[1] += cy;
}
gl_bind_texture(s->texture);
gl_vertex(v[0].vec[0], v[0].vec[1], 0, 0,0);
gl_vertex(v[1].vec[0], v[1].vec[1], 0, 0,1);
gl_vertex(v[2].vec[0], v[2].vec[1], 0, 1,1);
gl_vertex(v[3].vec[0], v[3].vec[1], 0, 1,0);
}
void draw_lines (std::vector<vec_t<2> >* points, int mode) {
glBegin(mode);
for (int i = 0; i < points->size(); i++)
gl_vertex(points->at(i));
glEnd();
}
