void hgeh::render_circle( HGE *hge, const Vec2D center, float radius, int segments, DWORD color )
{
const float increment = math::PI2 / segments;
float theta = 0.0f;
typedef std::vector<Vec2D> Positions;
Positions positions;
for( int i = 0; i < segments; ++i )
{
Vec2D p = Vec2D( std::cos( theta ), std::sin( theta ) );
p *= radius;
p += center;
positions.push_back( p );
theta += increment;
}
for( Positions::iterator it = positions.begin(); it != positions.end(); )
{
Vec2D p1 = *it;
++it;
Vec2D p2;
if( it != positions.end() ) {
p2 = *it;
}
else {
p2 = *positions.begin();
}
hge->Gfx_RenderLine( p1.x, p1.y, p2.x, p2.y, color );
}
}
void hgeh::render_solid_circle_slice( HGE *hge, const Vec2D center, float radius, int segments, float begin, float end, DWORD color )
{
const float increment = ( end - begin ) / segments;
float theta = begin;
typedef std::vector<Vec2D> Positions;
Positions positions;
for( int i = 0; i < segments; ++i )
{
Vec2D p = Vec2D( std::cos( theta ), std::sin( theta ) );
p *= radius;
p += center;
positions.push_back( p );
theta += increment;
}
for( Positions::iterator it = positions.begin(); it != positions.end(); )
{
Vec2D p1 = *it;
++it;
Vec2D p2;
if( it != positions.end() ) {
p2 = *it;
}
else {
p2 = *positions.begin();
}
hgeTriple t;
t.blend = BLEND_DEFAULT;
t.tex = 0;
hgeVertex v;
v.col = color;
v.tx = 0.0;
v.ty = 0.0;
v.x = center.x;
v.y = center.y;
t.v[0] = v;
v.x = p1.x;
v.y = p1.y;
t.v[1] = v;
v.x = p2.x;
v.y = p2.y;
t.v[2] = v;
hge->Gfx_RenderTriple( &t );
}
}