120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
|
|
#ifndef __SURFACE_PATCH_H__
|
|
#define __SURFACE_PATCH_H__
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
Bezier patch surface.
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
class idSurface_Patch : public idSurface {
|
|
|
|
public:
|
|
idSurface_Patch( void );
|
|
idSurface_Patch( int maxPatchWidth, int maxPatchHeight );
|
|
idSurface_Patch( const idSurface_Patch &patch );
|
|
~idSurface_Patch( void );
|
|
|
|
void SetSize( int patchWidth, int patchHeight );
|
|
int GetWidth( void ) const;
|
|
int GetHeight( void ) const;
|
|
|
|
// subdivide the patch mesh based on error
|
|
void Subdivide( float maxHorizontalError, float maxVerticalError, float maxLength, bool genNormals = false );
|
|
// subdivide the patch up to an explicit number of horizontal and vertical subdivisions
|
|
void SubdivideExplicit( int horzSubdivisions, int vertSubdivisions, bool genNormals, bool removeLinear = false );
|
|
|
|
protected:
|
|
int width; // width of patch
|
|
int height; // height of patch
|
|
int maxWidth; // maximum width allocated for
|
|
int maxHeight; // maximum height allocated for
|
|
bool expanded; // true if vertices are spaced out
|
|
|
|
private:
|
|
// put the approximation points on the curve
|
|
void PutOnCurve( void );
|
|
// remove columns and rows with all points on one line
|
|
void RemoveLinearColumnsRows( void );
|
|
// resize verts buffer
|
|
void ResizeExpanded( int height, int width );
|
|
// space points out over maxWidth * maxHeight buffer
|
|
void Expand( void );
|
|
// move all points to the start of the verts buffer
|
|
void Collapse( void );
|
|
// project a point onto a vector to calculate maximum curve error
|
|
void ProjectPointOntoVector( const idVec3 &point, const idVec3 &vStart, const idVec3 &vEnd, idVec3 &vProj );
|
|
// generate normals
|
|
void GenerateNormals( void );
|
|
// generate triangle indexes
|
|
void GenerateIndexes( void );
|
|
// lerp point from two patch point
|
|
void LerpVert( const idDrawVert &a, const idDrawVert &b, idDrawVert &out ) const;
|
|
// sample a single 3x3 patch
|
|
void SampleSinglePatchPoint( const idDrawVert ctrl[3][3], float u, float v, idDrawVert *out ) const;
|
|
void SampleSinglePatch( const idDrawVert ctrl[3][3], int baseCol, int baseRow, int width, int horzSub, int vertSub, idDrawVert *outVerts ) const;
|
|
};
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::idSurface_Patch
|
|
=================
|
|
*/
|
|
ID_INLINE idSurface_Patch::idSurface_Patch( void ) {
|
|
height = width = maxHeight = maxWidth = 0;
|
|
expanded = false;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::idSurface_Patch
|
|
=================
|
|
*/
|
|
ID_INLINE idSurface_Patch::idSurface_Patch( int maxPatchWidth, int maxPatchHeight ) {
|
|
width = height = 0;
|
|
maxWidth = maxPatchWidth;
|
|
maxHeight = maxPatchHeight;
|
|
verts.SetNum( maxWidth * maxHeight );
|
|
expanded = false;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::idSurface_Patch
|
|
=================
|
|
*/
|
|
ID_INLINE idSurface_Patch::idSurface_Patch( const idSurface_Patch &patch ) {
|
|
(*this) = patch;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::~idSurface_Patch
|
|
=================
|
|
*/
|
|
ID_INLINE idSurface_Patch::~idSurface_Patch() {
|
|
}
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::GetWidth
|
|
=================
|
|
*/
|
|
ID_INLINE int idSurface_Patch::GetWidth( void ) const {
|
|
return width;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
idSurface_Patch::GetHeight
|
|
=================
|
|
*/
|
|
ID_INLINE int idSurface_Patch::GetHeight( void ) const {
|
|
return height;
|
|
}
|
|
|
|
#endif /* !__SURFACE_PATCH_H__ */
|