TextureCoordinate MeshUtility::SphericalUVMapping(const FVector3& pointOnSphere)
{
//see http://en.wikipedia.org/wiki/UV_mapping
FVector3 d = -pointOnSphere;
Normalize(d);
return TextureCoordinate( 0.5f - ( std::atan2(d.z, d.x) / (2 * PI) ), 0.5f - 2 * ( std::asin(d.y) / (2 * PI) ) );
}
std::unique_ptr<Mesh> MeshUtility::MakeCube(float lengthOfOneSide)
{
//float_t halfLength = lengthOfOneSide / 2;
std::unique_ptr<Mesh> cube = std::make_unique<Mesh>();
cube->AddPositions( ModelUtility::CubePositions(lengthOfOneSide) );
cube->AddTextureCoordinate(TextureCoordinate(0, 0));
cube->AddTextureCoordinate(TextureCoordinate(1, 0));
cube->AddTextureCoordinate(TextureCoordinate(1, 1));
cube->AddTextureCoordinate(TextureCoordinate(0, 1));
//front
AddFaceToMesh(*cube, 0, 1, 2, 0, 1, 2);
AddFaceToMesh(*cube, 0, 2, 3, 0, 2, 3);
//back
AddFaceToMesh(*cube, 5, 4, 7, 0, 1, 2);
AddFaceToMesh(*cube, 5, 7, 6, 0, 2, 3);
//right
AddFaceToMesh(*cube, 1, 5, 6, 0, 1, 2);
AddFaceToMesh(*cube, 1, 6, 2, 0, 2, 3);
//left
AddFaceToMesh(*cube, 4, 0, 3, 0, 1, 2);
AddFaceToMesh(*cube, 4, 3, 7, 0, 2, 3);
//top
AddFaceToMesh(*cube, 3, 2, 6, 0, 1, 2);
AddFaceToMesh(*cube, 3, 6, 7, 0, 2, 3);
//bottom
AddFaceToMesh(*cube, 4, 5, 1, 0, 1, 2);
AddFaceToMesh(*cube, 4, 1, 0, 0, 2, 3);
cube->UpdateEdgeAdjacency();
return cube;
}
void GeometryBuilder::CreateHorizontal(const CVector& start, const CVector& end, float width, bool flip, const STexInfo& texture_info)
{
if(m_building_obj)
{
if(flip == GEO_H_DOWN)
{
//printf("GeometryBuilder: Adding a floor\n");
if(texture_info.rotation90)
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(start.x, start.y, start.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(start.x, start.y, start.z + width);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(end.x, end.y, end.z + width);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(end.x, end.y, end.z);
EndSurface();
}
else
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(start.x, start.y, start.z);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(start.x, start.y, start.z + width);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(end.x, end.y, end.z + width);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(end.x, end.y, end.z);
EndSurface();
}
}
else //flip == GEO_H_UP
{
if(texture_info.rotation90)
{
//printf("GeometryBuilder: Adding a roof\n");
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(start.x, start.y, start.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(end.x, end.y, end.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(end.x, end.y, end.z + width);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(start.x, start.y, start.z + width);
EndSurface();
}
else
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(start.x, start.y, start.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(end.x, end.y, end.z);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(end.x, end.y, end.z + width);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(start.x, start.y, start.z + width);
EndSurface();
}
}
}
}
// Adam's stair building code
void GeometryBuilder::CreateStairs(const CVector& start, const CVector& end, int StepCount, const STexInfo& stair_top, const STexInfo& stair_side)
{
if(m_building_obj)
{
CVector total_run, total_rise, total_width;
total_run.x = end.x - start.x; // x,0,0
total_rise.y = end.y - start.y; // 0,y,0
total_width.z = end.z - start.z; // 0,0,z
CVector run = total_run/StepCount;
CVector rise = total_rise/(StepCount + 1);
//printf("GeometryBuilder: Building stairs with %d stairs\n", StepCount);
CVector v1,v2,v3,v4;
v1 = start;
v4 = v1 + total_width;
for( int i = 0; i < StepCount; i++ )
{
v2 = v1 + rise;
v3 = v4 + rise;
//draw ^ v1 -> v2 -> v3 -> v4
if(stair_side.rotation90)
{
StartSurface();
Texture(stair_side.tex_id);
TextureCoordinate(0 * stair_side.tex_scale_u + stair_side.tex_offset_u, 1 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v1);
TextureCoordinate(-1 * stair_side.tex_scale_u + stair_side.tex_offset_u, 1 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v2);
TextureCoordinate(-1 * stair_side.tex_scale_u + stair_side.tex_offset_u, 0 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v3);
TextureCoordinate(0 * stair_side.tex_scale_u + stair_side.tex_offset_u, 0 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v4);
EndSurface();
}
else
{
StartSurface();
Texture(stair_side.tex_id);
TextureCoordinate(1 * stair_side.tex_scale_u + stair_side.tex_offset_u, 0 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v1);
TextureCoordinate(1 * stair_side.tex_scale_u + stair_side.tex_offset_u, 1 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v2);
TextureCoordinate(0 * stair_side.tex_scale_u + stair_side.tex_offset_u, 1 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v3);
TextureCoordinate(0 * stair_side.tex_scale_u + stair_side.tex_offset_u, 0 * stair_side.tex_scale_v + stair_side.tex_offset_v);
Vertex(v4);
EndSurface();
}
v1 = v2 + run;
v4 = v3 + run;
//draw ^ v2 -> v1 -> v4 -> v3
if(stair_top.rotation90)
{
StartSurface();
Texture(stair_top.tex_id);
TextureCoordinate(0 * stair_top.tex_scale_u + stair_top.tex_offset_u, 1 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v2);
TextureCoordinate(-1 * stair_top.tex_scale_u + stair_top.tex_offset_u, 1 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v1);
TextureCoordinate(-1 * stair_top.tex_scale_u + stair_top.tex_offset_u, 0 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v4);
TextureCoordinate(0 * stair_top.tex_scale_u + stair_top.tex_offset_u, 0 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v3);
EndSurface();
}
else
{
StartSurface();
Texture(stair_top.tex_id);
TextureCoordinate(1 * stair_top.tex_scale_u + stair_top.tex_offset_u, 0 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v2);
TextureCoordinate(1 * stair_top.tex_scale_u + stair_top.tex_offset_u, 1 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v1);
TextureCoordinate(0 * stair_top.tex_scale_u + stair_top.tex_offset_u, 1 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v4);
TextureCoordinate(0 * stair_top.tex_scale_u + stair_top.tex_offset_u, 0 * stair_top.tex_scale_v + stair_top.tex_offset_v);
Vertex(v3);
EndSurface();
}
}
}
}
/**
Creates a vertical wall, starting at start and going to end.
Start should be the lower
*/
void GeometryBuilder::CreateVertical(const CVector& start, const CVector& end, float height, bool flip, const STexInfo& texture_info)
{
if(m_building_obj)
{
if(flip == GEO_V_RIGHT)
{
//printf("GeometryBuilder: Adding a right wall\n");
//Right hand wall, normal pointing to the left
if(texture_info.rotation90) //TODO change this system ENTIRELY.
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(start.x, start.y, start.z);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(start.x, start.y + height, start.z);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(end.x, end.y + height, end.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(end.x, end.y, end.z);
EndSurface();
}
else
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(start.x, start.y, start.z);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(start.x, start.y + height, start.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(end.x, end.y + height, end.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(end.x, end.y, end.z);
EndSurface();
}
}
else //flip == GEO_V_LEFT
{
//printf("GeometryBuilder: Adding a left wall\n");
//left hand wall, normal pointing to the right
if(texture_info.rotation90)
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(start.x, start.y, start.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(end.x, end.y, end.z);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(end.x, end.y + height, end.z);
TextureCoordinate(-1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(start.x, start.y + height, start.z);
EndSurface();
}
else
{
StartSurface();
Texture(texture_info.tex_id);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom left
Vertex(start.x, start.y, start.z);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 0 * texture_info.tex_scale_v + texture_info.tex_offset_v); //bottom right
Vertex(end.x, end.y, end.z);
TextureCoordinate(1 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top right
Vertex(end.x, end.y + height, end.z);
TextureCoordinate(0 * texture_info.tex_scale_u + texture_info.tex_offset_u, 1 * texture_info.tex_scale_v + texture_info.tex_offset_v); //top left
Vertex(start.x, start.y + height, start.z);
EndSurface();
}
}
}
}
