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made some macros to reduce code duplication

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made naming completely consistent now


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1154 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2012-03-16 07:55:12 +00:00
parent 4f9c00faa7
commit b6f616f685
1 changed files with 61 additions and 87 deletions
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148
freeglut/freeglut/src/fg_geometry.c
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@ -144,6 +144,17 @@ static unsigned int ipow (int x, unsigned int y)
}
/* -- stuff that can be cached -- */
/* Cache of input to glDrawArrays */
#define DECLARE_SHAPE_CACHE(name,nameICaps,nameCaps)\
static GLboolean name##Cached = FALSE;\
static GLdouble name##_verts[nameCaps##_VERT_ELEM_PER_OBJ];\
static GLdouble name##_norms[nameCaps##_VERT_ELEM_PER_OBJ];\
static void fgh##nameICaps##Generate()\
{\
fghGenerateGeometry(nameCaps##_NUM_FACES, nameCaps##_NUM_VERT_PER_FACE,\
name##_v, name##_vi, name##_n,\
name##_verts, name##_norms);\
}
/*
* In general, we build arrays with all vertices or normals.
* We cant compress this and use glDrawElements as all combinations of
@ -154,8 +165,8 @@ static unsigned int ipow (int x, unsigned int y)
#define CUBE_NUM_VERT 8
#define CUBE_NUM_FACES 6
#define CUBE_NUM_VERT_PER_FACE 4
#define CUBE_VERT_PER_CUBE CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE
#define CUBE_VERT_ELEM_PER_CUBE CUBE_VERT_PER_CUBE*3
#define CUBE_VERT_PER_OBJ CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE
#define CUBE_VERT_ELEM_PER_OBJ CUBE_VERT_PER_OBJ*3
/* Vertex Coordinates */
static GLdouble cube_v[CUBE_NUM_VERT*3] =
{
@ -180,7 +191,7 @@ static GLdouble cube_n[CUBE_NUM_FACES*3] =
};
/* Vertex indices */
static GLubyte cube_vi[CUBE_VERT_PER_CUBE] =
static GLubyte cube_vi[CUBE_VERT_PER_OBJ] =
{
0,1,2,3,
0,3,4,5,
@ -189,23 +200,14 @@ static GLubyte cube_vi[CUBE_VERT_PER_CUBE] =
7,4,3,2,
4,7,6,5
};
/* Cache of input to glDrawArrays */
static GLboolean cubeCached = FALSE;
static GLdouble cube_verts[CUBE_VERT_ELEM_PER_CUBE];
static GLdouble cube_norms[CUBE_VERT_ELEM_PER_CUBE];
static void fghCubeGenerate()
{
fghGenerateGeometry(CUBE_NUM_FACES, CUBE_NUM_VERT_PER_FACE, cube_v, cube_vi, cube_n, cube_verts, cube_norms);
}
DECLARE_SHAPE_CACHE(cube,Cube,CUBE);
/* -- Octahedron -- */
#define OCTAHEDRON_NUM_VERT 6
#define OCTAHEDRON_NUM_FACES 8
#define OCTAHEDRON_NUM_VERT_PER_FACE 3
#define OCTAHEDRON_VERT_PER_OCTA OCTAHEDRON_NUM_FACES*OCTAHEDRON_NUM_VERT_PER_FACE
#define OCTAHEDRON_VERT_ELEM_PER_OCTA OCTAHEDRON_VERT_PER_OCTA*3
#define OCTAHEDRON_VERT_PER_OBJ OCTAHEDRON_NUM_FACES*OCTAHEDRON_NUM_VERT_PER_FACE
#define OCTAHEDRON_VERT_ELEM_PER_OBJ OCTAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
static GLdouble octahedron_v[OCTAHEDRON_NUM_VERT*3] =
@ -233,7 +235,7 @@ static GLdouble octahedron_n[OCTAHEDRON_NUM_FACES*3] =
};
/* Vertex indices */
static GLubyte octahedron_vi[OCTAHEDRON_VERT_PER_OCTA] =
static GLubyte octahedron_vi[OCTAHEDRON_VERT_PER_OBJ] =
{
0, 1, 2,
0, 5, 1,
@ -244,16 +246,7 @@ static GLubyte octahedron_vi[OCTAHEDRON_VERT_PER_OCTA] =
3, 4, 2,
3, 5, 4
};
/* Cache of input to glDrawArrays */
static GLboolean octahedronCached = FALSE;
static GLdouble octahedron_verts[OCTAHEDRON_VERT_ELEM_PER_OCTA];
static GLdouble octahedron_norms[OCTAHEDRON_VERT_ELEM_PER_OCTA];
static void fghOctahedronGenerate()
{
fghGenerateGeometry(OCTAHEDRON_NUM_FACES, OCTAHEDRON_NUM_VERT_PER_FACE, octahedron_v, octahedron_vi, octahedron_n, octahedron_verts, octahedron_norms);
}
DECLARE_SHAPE_CACHE(octahedron,Octahedron,OCTAHEDRON);
/* -- Tetrahedron -- */
/* Magic Numbers: r0 = ( 1, 0, 0 )
@ -265,14 +258,14 @@ static void fghOctahedronGenerate()
*
* Normals: The unit normals are simply the negative of the coordinates of the point not on the surface.
*/
#define TETR_NUM_VERT 4
#define TETR_NUM_FACES 4
#define TETR_NUM_VERT_PER_FACE 3
#define TETR_VERT_PER_TETR TETR_NUM_FACES*TETR_NUM_VERT_PER_FACE
#define TETR_VERT_ELEM_PER_TETR TETR_VERT_PER_TETR*3
#define TETRAHEDRON_NUM_VERT 4
#define TETRAHEDRON_NUM_FACES 4
#define TETRAHEDRON_NUM_VERT_PER_FACE 3
#define TETRAHEDRON_VERT_PER_OBJ TETRAHEDRON_NUM_FACES*TETRAHEDRON_NUM_VERT_PER_FACE
#define TETRAHEDRON_VERT_ELEM_PER_OBJ TETRAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
static GLdouble tetr_v[TETR_NUM_VERT*3] =
static GLdouble tetrahedron_v[TETRAHEDRON_NUM_VERT*3] =
{
1.0, 0.0, 0.0,
-0.333333333333, 0.942809041582, 0.0,
@ -280,7 +273,7 @@ static GLdouble tetr_v[TETR_NUM_VERT*3] =
-0.333333333333, -0.471404520791, -0.816496580928
};
/* Normal Vectors */
static GLdouble tetr_n[CUBE_NUM_FACES*3] =
static GLdouble tetrahedron_n[TETRAHEDRON_NUM_FACES*3] =
{
- 1.0, 0.0, 0.0,
0.333333333333, -0.942809041582, 0.0,
@ -289,23 +282,14 @@ static GLdouble tetr_n[CUBE_NUM_FACES*3] =
};
/* Vertex indices */
static GLubyte tetr_vi[TETR_VERT_PER_TETR] =
static GLubyte tetrahedron_vi[TETRAHEDRON_VERT_PER_OBJ] =
{
1, 3, 2,
0, 2, 3,
0, 3, 1,
0, 1, 2
};
/* Cache of input to glDrawArrays */
static GLboolean tetrCached = FALSE;
static GLdouble tetr_verts[TETR_VERT_ELEM_PER_TETR];
static GLdouble tetr_norms[TETR_VERT_ELEM_PER_TETR];
static void fghTetrahedronGenerate()
{
fghGenerateGeometry(TETR_NUM_FACES, TETR_NUM_VERT_PER_FACE, tetr_v, tetr_vi, tetr_n, tetr_verts, tetr_norms);
}
DECLARE_SHAPE_CACHE(tetrahedron,Tetrahedron,TETRAHEDRON);
/* -- Sierpinski Sponge -- */
static void fghSierpinskiSpongeGenerate ( int numLevels, GLdouble offset[3], GLdouble scale, GLdouble* vertices, GLdouble* normals )
@ -313,36 +297,36 @@ static void fghSierpinskiSpongeGenerate ( int numLevels, GLdouble offset[3], GLd
int i, j;
if ( numLevels == 0 )
{
for (i=0; i<TETR_NUM_FACES; i++)
for (i=0; i<TETRAHEDRON_NUM_FACES; i++)
{
int normIdx = i*3;
int faceIdxVertIdx = i*TETR_NUM_VERT_PER_FACE;
for (j=0; j<TETR_NUM_VERT_PER_FACE; j++)
int faceIdxVertIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE;
for (j=0; j<TETRAHEDRON_NUM_VERT_PER_FACE; j++)
{
int outIdx = i*TETR_NUM_VERT_PER_FACE*3+j*3;
int vertIdx = tetr_vi[faceIdxVertIdx+j]*3;
int outIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE*3+j*3;
int vertIdx = tetrahedron_vi[faceIdxVertIdx+j]*3;
vertices[outIdx ] = offset[0] + scale * tetr_v[vertIdx ];
vertices[outIdx+1] = offset[1] + scale * tetr_v[vertIdx+1];
vertices[outIdx+2] = offset[2] + scale * tetr_v[vertIdx+2];
vertices[outIdx ] = offset[0] + scale * tetrahedron_v[vertIdx ];
vertices[outIdx+1] = offset[1] + scale * tetrahedron_v[vertIdx+1];
vertices[outIdx+2] = offset[2] + scale * tetrahedron_v[vertIdx+2];
normals [outIdx ] = tetr_n[normIdx ];
normals [outIdx+1] = tetr_n[normIdx+1];
normals [outIdx+2] = tetr_n[normIdx+2];
normals [outIdx ] = tetrahedron_n[normIdx ];
normals [outIdx+1] = tetrahedron_n[normIdx+1];
normals [outIdx+2] = tetrahedron_n[normIdx+2];
}
}
}
else if ( numLevels > 0 )
{
GLdouble local_offset[3] ; /* Use a local variable to avoid buildup of roundoff errors */
unsigned int stride = ipow(4,--numLevels)*TETR_VERT_ELEM_PER_TETR;
unsigned int stride = ipow(4,--numLevels)*TETRAHEDRON_VERT_ELEM_PER_OBJ;
scale /= 2.0 ;
for ( i = 0 ; i < TETR_NUM_FACES ; i++ )
for ( i = 0 ; i < TETRAHEDRON_NUM_FACES ; i++ )
{
int idx = i*3;
local_offset[0] = offset[0] + scale * tetr_v[idx ];
local_offset[1] = offset[1] + scale * tetr_v[idx+1];
local_offset[2] = offset[2] + scale * tetr_v[idx+2];
local_offset[0] = offset[0] + scale * tetrahedron_v[idx ];
local_offset[1] = offset[1] + scale * tetrahedron_v[idx+1];
local_offset[2] = offset[2] + scale * tetrahedron_v[idx+2];
fghSierpinskiSpongeGenerate ( numLevels, local_offset, scale, vertices+i*stride, normals+i*stride );
}
}
@ -403,6 +387,16 @@ static void fghCircleTable(double **sint,double **cost,const int n)
/* -- INTERNAL DRAWING functions to avoid code duplication ------------- */
#define DECLARE_INTERNAL_DRAW(name,nameICaps,nameCaps)\
static void fgh##nameICaps( GLboolean useWireMode )\
{\
if (!name##Cached)\
{\
fgh##nameICaps##Generate();\
name##Cached = TRUE;\
}\
fghDrawGeometry(GL_TRIANGLES,name##_verts,name##_norms,nameCaps##_VERT_PER_OBJ,useWireMode);\
}
static void fghCube( GLdouble dSize, GLboolean useWireMode )
{
@ -417,44 +411,24 @@ static void fghCube( GLdouble dSize, GLboolean useWireMode )
int i;
/* Need to build new vertex list containing vertices for cube of different size */
GLdouble *vertices = malloc(CUBE_VERT_ELEM_PER_CUBE * sizeof(GLdouble));
for (i=0; i<CUBE_VERT_ELEM_PER_CUBE; i++)
GLdouble *vertices = malloc(CUBE_VERT_ELEM_PER_OBJ * sizeof(GLdouble));
for (i=0; i<CUBE_VERT_ELEM_PER_OBJ; i++)
vertices[i] = dSize*cube_verts[i];
fghDrawGeometry(GL_QUADS,vertices ,cube_norms,CUBE_VERT_PER_CUBE,useWireMode);
fghDrawGeometry(GL_QUADS,vertices ,cube_norms,CUBE_VERT_PER_OBJ,useWireMode);
}
else
fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_CUBE,useWireMode);
}
static void fghOctahedron( GLboolean useWireMode )
{
if (!octahedronCached)
{
fghOctahedronGenerate();
octahedronCached = TRUE;
}
fghDrawGeometry(GL_TRIANGLES,octahedron_verts,octahedron_norms,OCTAHEDRON_VERT_PER_OCTA,useWireMode);
}
static void fghTetrahedron( GLboolean useWireMode )
{
if (!tetrCached)
{
fghTetrahedronGenerate();
tetrCached = TRUE;
}
fghDrawGeometry(GL_TRIANGLES,tetr_verts,tetr_norms,TETR_VERT_PER_TETR,useWireMode);
fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_OBJ,useWireMode);
}
DECLARE_INTERNAL_DRAW(octahedron,Octahedron,OCTAHEDRON);
DECLARE_INTERNAL_DRAW(tetrahedron,Tetrahedron,TETRAHEDRON);
static void fghSierpinskiSponge ( int numLevels, GLdouble offset[3], GLdouble scale, GLboolean useWireMode )
{
GLdouble *vertices;
GLdouble * normals;
GLsizei numTetr = numLevels<0? 0 : ipow(4,numLevels); /* No sponge for numLevels below 0 */
GLsizei numVert = numTetr*TETR_VERT_PER_TETR;
GLsizei numVert = numTetr*TETRAHEDRON_VERT_PER_OBJ;
if (numTetr)
{