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cube now done with triangles, internal edges on each face hidden with

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edge flag


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1157 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
dcnieho 2012-03-16 11:06:23 +00:00
parent b95ed51118
commit 977a9f1e6b
1 changed files with 67 additions and 33 deletions
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100
freeglut/freeglut/src/fg_geometry.c
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@ -29,6 +29,9 @@
#include "fg_internal.h"
/*
*
* Need more types of polyhedra? See CPolyhedron in MRPT
*
* TODO BEFORE THE STABLE RELEASE:
*
* See fghTetrahedron
@ -67,7 +70,7 @@
* useWireMode controls the drawing of solids (false) or wire frame
* versions (TRUE) of the geometry you pass
*/
static void fghDrawGeometry(GLenum vertexMode, GLdouble* vertices, GLdouble* normals, GLsizei numVertices, GLboolean useWireMode)
static void fghDrawGeometry(GLenum vertexMode, GLdouble *vertices, GLdouble *normals, GLboolean *edgeFlags, GLsizei numVertices, GLboolean useWireMode)
{
if (useWireMode)
{
@ -79,13 +82,19 @@ static void fghDrawGeometry(GLenum vertexMode, GLdouble* vertices, GLdouble* nor
{
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
if (edgeFlags)
glEnableClientState(GL_EDGE_FLAG_ARRAY);
glVertexPointer(3, GL_DOUBLE, 0, vertices);
glNormalPointer(GL_DOUBLE, 0, normals);
if (edgeFlags)
glEdgeFlagPointer(0,edgeFlags);
glDrawArrays(vertexMode, 0, numVertices);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
if (edgeFlags)
glDisableClientState(GL_EDGE_FLAG_ARRAY);
}
else
{
@ -93,6 +102,7 @@ static void fghDrawGeometry(GLenum vertexMode, GLdouble* vertices, GLdouble* nor
glBegin(vertexMode);
for(i=0; i<numVertices; i++)
{
glEdgeFlag(edgeFlags[i]);
glNormal3dv(normals+i*3);
printf("n(%i) = (%1.4f,%1.4f,%1.4f)\n",i,*(normals+i*3),*(normals+i*3+1),*(normals+i*3+2));
glVertex3dv(vertices+i*3);
@ -107,7 +117,7 @@ static void fghDrawGeometry(GLenum vertexMode, GLdouble* vertices, GLdouble* nor
}
}
static void fghGenerateGeometry(int numFaces, int numVertPerFace, GLdouble *vertices, GLubyte* vertIndices, GLdouble *normals, GLdouble *vertOut, GLdouble *normOut)
static void fghGenerateGeometryWithEdgeFlag(int numFaces, int numEdgePerFace, GLdouble *vertices, GLubyte *vertIndices, GLdouble *normals, GLboolean *edgeFlags, GLdouble *vertOut, GLdouble *normOut, GLboolean *edgeFlagsOut)
{
int i,j;
/*
@ -119,10 +129,10 @@ static void fghGenerateGeometry(int numFaces, int numVertPerFace, GLdouble *vert
for (i=0; i<numFaces; i++)
{
int normIdx = i*3;
int faceIdxVertIdx = i*numVertPerFace;
for (j=0; j<numVertPerFace; j++)
int faceIdxVertIdx = i*numEdgePerFace; // index to first element of "row" in vertex indices
for (j=0; j<numEdgePerFace; j++)
{
int outIdx = i*numVertPerFace*3+j*3;
int outIdx = i*numEdgePerFace*3+j*3;
int vertIdx = vertIndices[faceIdxVertIdx+j]*3;
vertOut[outIdx ] = vertices[vertIdx ];
@ -132,10 +142,18 @@ static void fghGenerateGeometry(int numFaces, int numVertPerFace, GLdouble *vert
normOut[outIdx ] = normals [normIdx ];
normOut[outIdx+1] = normals [normIdx+1];
normOut[outIdx+2] = normals [normIdx+2];
if (edgeFlagsOut)
edgeFlagsOut[faceIdxVertIdx+j] = edgeFlags[j];
}
}
}
static void fghGenerateGeometry(int numFaces, int numEdgePerFace, GLdouble *vertices, GLubyte *vertIndices, GLdouble *normals, GLdouble *vertOut, GLdouble *normOut)
{
fghGenerateGeometryWithEdgeFlag(numFaces, numEdgePerFace, vertices, vertIndices, normals, NULL, vertOut, normOut, NULL);
}
/* -- INTERNAL SETUP OF GEOMETRY --------------------------------------- */
static unsigned int ipow (int x, unsigned int y)
@ -151,10 +169,21 @@ static unsigned int ipow (int x, unsigned int y)
static GLdouble name##_norms[nameCaps##_VERT_ELEM_PER_OBJ];\
static void fgh##nameICaps##Generate()\
{\
fghGenerateGeometry(nameCaps##_NUM_FACES, nameCaps##_NUM_VERT_PER_FACE,\
fghGenerateGeometry(nameCaps##_NUM_FACES, nameCaps##_NUM_EDGE_PER_FACE,\
name##_v, name##_vi, name##_n,\
name##_verts, name##_norms);\
}
#define DECLARE_SHAPE_CACHE_WITH_EDGE_FLAG(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 GLboolean name##_edgeFlags[nameCaps##_VERT_PER_OBJ];\
static void fgh##nameICaps##Generate()\
{\
fghGenerateGeometryWithEdgeFlag(nameCaps##_NUM_FACES, nameCaps##_NUM_EDGE_PER_FACE,\
name##_v, name##_vi, name##_n, name##_ef,\
name##_verts, name##_norms, name##_edgeFlags);\
}
/*
* In general, we build arrays with all vertices or normals.
* We cant compress this and use glDrawElements as all combinations of
@ -164,9 +193,9 @@ static unsigned int ipow (int x, unsigned int y)
/* -- Cube -- */
#define CUBE_NUM_VERT 8
#define CUBE_NUM_FACES 6
#define CUBE_NUM_VERT_PER_FACE 4
#define CUBE_VERT_PER_OBJ CUBE_NUM_FACES*CUBE_NUM_VERT_PER_FACE
#define CUBE_VERT_ELEM_PER_OBJ CUBE_VERT_PER_OBJ*3
#define CUBE_NUM_EDGE_PER_FACE 4+2 /* 1.5 is overhead factor when drawing quads as triangles */
#define CUBE_VERT_PER_OBJ (CUBE_NUM_FACES)*(CUBE_NUM_EDGE_PER_FACE)
#define CUBE_VERT_ELEM_PER_OBJ (CUBE_VERT_PER_OBJ)*3
/* Vertex Coordinates */
static GLdouble cube_v[CUBE_NUM_VERT*3] =
{
@ -193,20 +222,25 @@ static GLdouble cube_n[CUBE_NUM_FACES*3] =
/* Vertex indices */
static GLubyte cube_vi[CUBE_VERT_PER_OBJ] =
{
0,1,2,3,
0,3,4,5,
0,5,6,1,
1,6,7,2,
7,4,3,2,
4,7,6,5
0,1,2,0,2,3,
0,3,4,0,4,5,
0,5,6,0,6,1,
1,6,7,1,7,2,
7,4,3,7,3,2,
4,7,6,4,6,5
};
DECLARE_SHAPE_CACHE(cube,Cube,CUBE);
/* edge flags */
static GLboolean cube_ef[CUBE_NUM_EDGE_PER_FACE] =
{
1,1,0,0,1,1
};
DECLARE_SHAPE_CACHE_WITH_EDGE_FLAG(cube,Cube,CUBE);
/* Icosahedron */
#define ICOSAHEDRON_NUM_VERT 12
#define ICOSAHEDRON_NUM_FACES 20
#define ICOSAHEDRON_NUM_VERT_PER_FACE 3
#define ICOSAHEDRON_VERT_PER_OBJ ICOSAHEDRON_NUM_FACES*ICOSAHEDRON_NUM_VERT_PER_FACE
#define ICOSAHEDRON_NUM_EDGE_PER_FACE 3
#define ICOSAHEDRON_VERT_PER_OBJ ICOSAHEDRON_NUM_FACES*ICOSAHEDRON_NUM_EDGE_PER_FACE
#define ICOSAHEDRON_VERT_ELEM_PER_OBJ ICOSAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
static GLdouble icosahedron_v[ICOSAHEDRON_NUM_VERT*3] =
@ -282,8 +316,8 @@ DECLARE_SHAPE_CACHE(icosahedron,Icosahedron,ICOSAHEDRON);
/* -- Octahedron -- */
#define OCTAHEDRON_NUM_VERT 6
#define OCTAHEDRON_NUM_FACES 8
#define OCTAHEDRON_NUM_VERT_PER_FACE 3
#define OCTAHEDRON_VERT_PER_OBJ OCTAHEDRON_NUM_FACES*OCTAHEDRON_NUM_VERT_PER_FACE
#define OCTAHEDRON_NUM_EDGE_PER_FACE 3
#define OCTAHEDRON_VERT_PER_OBJ OCTAHEDRON_NUM_FACES*OCTAHEDRON_NUM_EDGE_PER_FACE
#define OCTAHEDRON_VERT_ELEM_PER_OBJ OCTAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
@ -328,8 +362,8 @@ DECLARE_SHAPE_CACHE(octahedron,Octahedron,OCTAHEDRON);
/* -- RhombicDodecahedron -- */
#define RHOMBICDODECAHEDRON_NUM_VERT 14
#define RHOMBICDODECAHEDRON_NUM_FACES 12
#define RHOMBICDODECAHEDRON_NUM_VERT_PER_FACE 4
#define RHOMBICDODECAHEDRON_VERT_PER_OBJ RHOMBICDODECAHEDRON_NUM_FACES*RHOMBICDODECAHEDRON_NUM_VERT_PER_FACE
#define RHOMBICDODECAHEDRON_NUM_EDGE_PER_FACE 4
#define RHOMBICDODECAHEDRON_VERT_PER_OBJ RHOMBICDODECAHEDRON_NUM_FACES*RHOMBICDODECAHEDRON_NUM_EDGE_PER_FACE
#define RHOMBICDODECAHEDRON_VERT_ELEM_PER_OBJ RHOMBICDODECAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
@ -397,8 +431,8 @@ DECLARE_SHAPE_CACHE(rhombicdodecahedron,RhombicDodecahedron,RHOMBICDODECAHEDRON)
*/
#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_NUM_EDGE_PER_FACE 3
#define TETRAHEDRON_VERT_PER_OBJ TETRAHEDRON_NUM_FACES*TETRAHEDRON_NUM_EDGE_PER_FACE
#define TETRAHEDRON_VERT_ELEM_PER_OBJ TETRAHEDRON_VERT_PER_OBJ*3
/* Vertex Coordinates */
@ -437,10 +471,10 @@ static void fghSierpinskiSpongeGenerate ( int numLevels, GLdouble offset[3], GLd
for (i=0; i<TETRAHEDRON_NUM_FACES; i++)
{
int normIdx = i*3;
int faceIdxVertIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE;
for (j=0; j<TETRAHEDRON_NUM_VERT_PER_FACE; j++)
int faceIdxVertIdx = i*TETRAHEDRON_NUM_EDGE_PER_FACE;
for (j=0; j<TETRAHEDRON_NUM_EDGE_PER_FACE; j++)
{
int outIdx = i*TETRAHEDRON_NUM_VERT_PER_FACE*3+j*3;
int outIdx = i*TETRAHEDRON_NUM_EDGE_PER_FACE*3+j*3;
int vertIdx = tetrahedron_vi[faceIdxVertIdx+j]*3;
vertices[outIdx ] = offset[0] + scale * tetrahedron_v[vertIdx ];
@ -530,9 +564,9 @@ static void fghCircleTable(double **sint,double **cost,const int n)
if (!name##Cached)\
{\
fgh##nameICaps##Generate();\
name##Cached = TRUE;\
name##Cached = GL_TRUE;\
}\
fghDrawGeometry(vertexMode,name##_verts,name##_norms,nameCaps##_VERT_PER_OBJ,useWireMode);\
fghDrawGeometry(vertexMode,name##_verts,name##_norms,NULL,nameCaps##_VERT_PER_OBJ,useWireMode);\
}
static void fghCube( GLdouble dSize, GLboolean useWireMode )
@ -540,7 +574,7 @@ static void fghCube( GLdouble dSize, GLboolean useWireMode )
if (!cubeCached)
{
fghCubeGenerate();
cubeCached = TRUE;
cubeCached = GL_TRUE;
}
if (dSize!=1.)
@ -552,10 +586,10 @@ static void fghCube( GLdouble dSize, GLboolean useWireMode )
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_OBJ,useWireMode);
fghDrawGeometry(GL_TRIANGLES,vertices ,cube_norms,cube_edgeFlags,CUBE_VERT_PER_OBJ,useWireMode);
}
else
fghDrawGeometry(GL_QUADS,cube_verts,cube_norms,CUBE_VERT_PER_OBJ,useWireMode);
fghDrawGeometry(GL_TRIANGLES,cube_verts,cube_norms,cube_edgeFlags,CUBE_VERT_PER_OBJ,useWireMode);
}
DECLARE_INTERNAL_DRAW(GL_TRIANGLES,icosahedron,Icosahedron,ICOSAHEDRON);
@ -580,7 +614,7 @@ static void fghSierpinskiSponge ( int numLevels, GLdouble offset[3], GLdouble sc
fghSierpinskiSpongeGenerate ( numLevels, offset, scale, vertices, normals );
/* Draw and cleanup */
fghDrawGeometry(GL_TRIANGLES,vertices,normals,numVert,useWireMode);
fghDrawGeometry(GL_TRIANGLES,vertices,normals,NULL,numVert,useWireMode);
free(vertices);
free(normals );
}