//------------------------------------------------------------------------------
void
DebugDraw::DrawSolidCircle( const b2Vec2 & center, float32 radius,
const b2Vec2 & axis, const b2Color & color )
{
b2Vec2 vertices[16];
_getCircleVertices( vertices, center, radius );
DrawSolidPolygon( vertices, 16, color );
}
void Render::DrawShape(b2Fixture* fixture, const b2Transform& xf, const b2Color& color) {
switch (fixture->GetType()) {
case b2Shape::e_circle: {
b2CircleShape* circle = (b2CircleShape*) fixture->GetShape();
b2Vec2 center = b2Mul(xf, circle->m_p);
float32 radius = circle->m_radius;
b2Vec2 axis = b2Mul(xf.q, b2Vec2(1.0f, 0.0f));
DrawSolidCircle(center, radius, axis, color);
}
break;
case b2Shape::e_edge: {
b2EdgeShape* edge = (b2EdgeShape*) fixture->GetShape();
b2Vec2 v1 = b2Mul(xf, edge->m_vertex1);
b2Vec2 v2 = b2Mul(xf, edge->m_vertex2);
DrawSegment(v1, v2, color);
}
break;
case b2Shape::e_chain: {
b2ChainShape* chain = (b2ChainShape*) fixture->GetShape();
int32 count = chain->m_count;
const b2Vec2* vertices = chain->m_vertices;
b2Vec2 v1 = b2Mul(xf, vertices[0]);
for (int32 i = 1; i < count; ++i) {
b2Vec2 v2 = b2Mul(xf, vertices[i]);
DrawSegment(v1, v2, color);
DrawCircle(v1, 0.05f, color);
v1 = v2;
}
}
break;
case b2Shape::e_polygon: {
b2PolygonShape* poly = (b2PolygonShape*) fixture->GetShape();
int32 vertexCount = poly->m_vertexCount;
b2Assert(vertexCount <= b2_maxPolygonVertices);
b2Vec2 vertices[b2_maxPolygonVertices];
for (int32 i = 0; i < vertexCount; ++i) {
vertices[i] = b2Mul(xf, poly->m_vertices[i]);
}
DrawSolidPolygon(vertices, vertexCount, color);
}
break;
default:
break;
}
}
void Drawer::DrawShape(b2Transform& transf, b2Fixture *fix, b2Color& col)
{
// The shape contains the vertices/points of the primitive structure
// The coordinates of the vertices are in local coordinates and need to be transformed
// Transformation is done via translation and rotation with the b2Transform of the body the shape is living in
b2Shape *shape = fix->GetShape();
switch (shape->GetType()) {
case b2Shape::e_polygon:
{
b2PolygonShape *pShape = dynamic_cast<b2PolygonShape *>(shape);
int vertexCount = pShape->GetVertexCount();
b2Vec2 poly[b2_maxPolygonVertices];
for (int i = 0; i < vertexCount; i++) {
poly[i] = b2Mul(transf, pShape->m_vertices[i]);
}
DrawSolidPolygon(poly, vertexCount, col);
}
break;
case b2Shape::e_circle:
{
b2CircleShape *cShape = dynamic_cast<b2CircleShape *>(shape);
b2Vec2 cent = b2Mul(transf, cShape->m_p);
DrawSolidCircle(cent, cShape->m_radius, col);
}
break;
case b2Shape::e_edge:
{
b2EdgeShape *eShape = dynamic_cast<b2EdgeShape *>(shape);
b2Vec2 p1 = b2Mul(transf, eShape->m_vertex1);
b2Vec2 p2 = b2Mul(transf, eShape->m_vertex2);
DrawSegment(p1, p2, col);
}
break;
default:
break;
}
}
//if usezbuffer = false. we use 1/z buffer
void CRenderObjectsManager:: Render(bool bLighting,bool bbackfaceremove,bool usezbuffer)
{
//convert to world coordinate system
Model2World();
int i = 0;
int j = 0;
////back face removal
{
for( i = 0; i < m_RenderList.size();++i)
{
CRenderObject *pObj = m_RenderList[i];
POLYGONLIST &polygonlist = pObj->m_PolyGonList;
int polygonsize = polygonlist.size();
for( j = 0; j < polygonsize;++j)
{
POLYGON &polygon = polygonlist[j];
if(bbackfaceremove)
{
VERTICESLIST &pointlist = pObj->m_translateverticesList;
Vector4D p0p1(pointlist[polygon.v[1]].vertex-pointlist[polygon.v[0]].vertex);
Vector4D p0p2(pointlist[polygon.v[2]].vertex-pointlist[polygon.v[0]].vertex);
Vector4D normal = p0p1.CrossProduct(p0p2);
Vector4D viewvec(m_pCam->m_pos-pointlist[polygon.v[0]].vertex);
float dp = viewvec.DotProduct(normal);
if(dp <0)
{
polygon.state |= POLYGON_BACKFACEREMOVE;
}
}
else
{
polygon.state &= ~POLYGON_BACKFACEREMOVE;
}
}
}
}
//Lighting handle
for( i = 0; i < m_RenderList.size();++i)
{
CRenderObject *pObj = m_RenderList[i];
POLYGONLIST &polygonlist = pObj->m_PolyGonList;
int polygonsize = polygonlist.size();
for( j = 0; j < polygonsize;++j)
{
POLYGON &polygon = polygonlist[j];
if(polygon.state & POLYGON_BACKFACEREMOVE) continue;
if(bLighting)
polygon.state |= POLYGON_LIGHTING_PROCESSED;
else
{
polygon.state &= ~POLYGON_LIGHTING_PROCESSED;
continue;
}
VERTICESLIST &pointlist = pObj->m_translateverticesList;
ProcessLighting(pObj,polygon);
}
}
//convert them to the view,screen
Matrix mat = m_pCam->GetWorldToCameraMatrix();
mat *= m_pCam->GetCameraToProjectionMatrix();
mat *=m_pCam->GetProjectionToScreenMatrix();
//4d coordinate .need to convert it to 3d
for( i = 0; i < m_RenderList.size();++i)
{
CRenderObject *pObj = m_RenderList[i];
VERTICESLIST & Translatedvertices = pObj->m_translateverticesList;
for( j = 0; j < Translatedvertices.size();++j)
{
float z = Translatedvertices[j].vertex.z;
Translatedvertices[j].vertex *= mat;
Translatedvertices[j].vertex *= 1/Translatedvertices[j].vertex.w ;
Translatedvertices[j].vertex.z =z;
}
}
//sort them
for( i = 0; i < m_RenderList.size();++i)
{
CRenderObject *pObj = m_RenderList[i];
POLYGONLIST &polygonlist = pObj->m_PolyGonList;
int polygonsize = polygonlist.size();
for( j = 0; j < polygonsize;++j)
{
POLYGON &polygon = polygonlist[j];
if(polygon.state & POLYGON_BACKFACEREMOVE) continue;
VERTICESLIST &pointlist = pObj->m_translateverticesList;
/************************************************************************/
/* Draw wireframe polygon */
/************************************************************************/
/*line(pointlist[polygon.v[0]].x,pointlist[polygon.v[0]].y,
pointlist[polygon.v[1]].x,pointlist[polygon.v[1]].y,
RGB(0,255,0));
line(pointlist[polygon.v[1]].x,pointlist[polygon.v[1]].y,
pointlist[polygon.v[2]].x,pointlist[polygon.v[2]].y,
RGB(0,255,0));
line(pointlist[polygon.v[2]].x,pointlist[polygon.v[2]].y,
pointlist[polygon.v[0]].x,pointlist[polygon.v[0]].y,
RGB(0,255,0));*/
//or
//DrawWireFramePolygon(pointlist[polygon.v[0]],pointlist[polygon.v[1]],
// pointlist[polygon.v[2]],RGB(0,0,0));
/************************************************************************/
/* End wireframe polygon */
/************************************************************************/
/************************************************************************/
/* Solid polygon */
/************************************************************************/
//DrawSolidPolygon(pointlist[polygon.v[0]],pointlist[polygon.v[1]],
// pointlist[polygon.v[2]],RGB(0,255,0));
/************************************************************************/
/* End Solid Polygon */
/************************************************************************/
/************************************************************************/
/* Lighting processing */
/************************************************************************/
if((polygon.state & SHADE_MODEL_CONSTANT) && !(polygon.state & OBJECT_HAS_TEXTURE))
DrawSolidPolygon(pointlist[polygon.v[0]].vertex,
pointlist[polygon.v[1]].vertex,
pointlist[polygon.v[2]].vertex,
polygon.state & POLYGON_LIGHTING_PROCESSED ?
polygon.ret_color.rgba:polygon.color.rgba);
else if( polygon.state & OBJECT_HAS_TEXTURE)
{
if(usezbuffer)
RenderTextureTriangle(pObj,polygon);
else
DrawTextureTriangle_invz(polygon,pObj);
}
else
{
DrawWireFramePolygon(pointlist[polygon.v[0]].vertex,pointlist[polygon.v[1]].vertex,
pointlist[polygon.v[2]].vertex,polygon.color.rgba);
}
}
}
}