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fg_geometry: sphere: GL_UNSIGNED_INT->GL_UNSIGNED_SHORT for OpenGL ES 1.0 support

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1219 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
beuc 2012-03-31 20:03:01 +00:00
parent 4c7a212acb
commit 1dae162bb0
2 changed files with 21 additions and 18 deletions
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4
freeglut/freeglut/include/GL/freeglut_std.h
View File

@ -528,10 +528,10 @@ FGAPI int FGAPIENTRY glutStrokeLength( void* font, const unsigned char* stri
#ifndef GL_ES_VERSION_2_0
FGAPI void FGAPIENTRY glutWireCube( double size );
FGAPI void FGAPIENTRY glutSolidCube( double size );
#endif
#ifndef EGL_VERSION_1_0
FGAPI void FGAPIENTRY glutWireSphere( double radius, GLint slices, GLint stacks );
FGAPI void FGAPIENTRY glutSolidSphere( double radius, GLint slices, GLint stacks );
#endif
#ifndef EGL_VERSION_1_0
FGAPI void FGAPIENTRY glutWireCone( double base, double height, GLint slices, GLint stacks );
FGAPI void FGAPIENTRY glutSolidCone( double base, double height, GLint slices, GLint stacks );
#endif

35
freeglut/freeglut/src/fg_geometry.c
View File

@ -823,6 +823,9 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
int i,j,idx, nVert;
GLfloat *vertices, *normals;
if (slices * stacks > 65535)
fgWarning("fghSphere: too many slices or stacks requested, indices will wrap");
/* Generate vertices and normals */
fghGenerateSphere((GLfloat)radius,slices,stacks,&vertices,&normals,&nVert);
@ -832,19 +835,19 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
if (useWireMode)
{
GLuint *sliceIdx, *stackIdx;
GLushort *sliceIdx, *stackIdx;
/* First, generate vertex index arrays for drawing with glDrawElements
* We have a bunch of line_loops to draw for each stack, and a
* bunch for each slice.
*/
sliceIdx = malloc(slices*(stacks+1)*sizeof(GLuint));
stackIdx = malloc(slices*(stacks-1)*sizeof(GLuint));
sliceIdx = malloc(slices*(stacks+1)*sizeof(GLushort));
stackIdx = malloc(slices*(stacks-1)*sizeof(GLushort));
/* generate for each stack */
for (i=0,idx=0; i<slices; i++)
{
GLuint offset = 1+i; /* start at 1 (0 is top vertex), and we advance one slice as we go along */
GLushort offset = 1+i; /* start at 1 (0 is top vertex), and we advance one slice as we go along */
sliceIdx[idx++] = 0; /* vertex on top */
for (j=0; j<stacks-1; j++, idx++)
{
@ -856,7 +859,7 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
/* generate for each stack */
for (i=0,idx=0; i<stacks-1; i++)
{
GLuint offset = 1+i*slices; /* start at 1 (0 is top vertex), and we advance one stack down as we go along */
GLushort offset = 1+i*slices; /* start at 1 (0 is top vertex), and we advance one stack down as we go along */
for (j=0; j<slices; j++, idx++)
{
stackIdx[idx] = offset+j;
@ -871,10 +874,10 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
glNormalPointer(GL_FLOAT, 0, normals);
/*draw slices*/
for (i=0; i<slices; i++)
glDrawElements(GL_LINE_STRIP,stacks+1,GL_UNSIGNED_INT,sliceIdx+i*(stacks+1));
glDrawElements(GL_LINE_STRIP,stacks+1,GL_UNSIGNED_SHORT,sliceIdx+i*(stacks+1));
/*draw stacks*/
for (i=0; i<stacks-1; i++)
glDrawElements(GL_LINE_LOOP, slices,GL_UNSIGNED_INT,stackIdx+i*slices);
glDrawElements(GL_LINE_LOOP, slices,GL_UNSIGNED_SHORT,stackIdx+i*slices);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
@ -885,7 +888,7 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
}
else
{
GLuint *topIdx, *bottomIdx, *stripIdx;
GLushort *topIdx, *bottomIdx, *stripIdx;
/* First, generate vertex index arrays for drawing with glDrawElements
* Top and bottom are covered with a triangle fan
* Each other stack with triangle strip. Only need to generate on
@ -894,9 +897,9 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
*/
/* Allocate buffers for indices, bail out if memory allocation fails */
topIdx = malloc((slices+2)*sizeof(GLuint));
bottomIdx = malloc((slices+2)*sizeof(GLuint));
stripIdx = malloc((slices+1)*2*(stacks-2)*sizeof(GLuint));
topIdx = malloc((slices+2)*sizeof(GLushort));
bottomIdx = malloc((slices+2)*sizeof(GLushort));
stripIdx = malloc((slices+1)*2*(stacks-2)*sizeof(GLushort));
if (!(topIdx) || !(bottomIdx) || !(stripIdx))
{
free(topIdx);
@ -924,7 +927,7 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
/* Strip indices are relative to first index belonging to strip, NOT relative to first vertex/normal pair in array */
for (i=0,idx=0; i<stacks-2; i++, idx+=2)
{
GLuint offset = 1+i*slices; /* triangle_strip indices start at 1 (0 is top vertex), and we advance one stack down as we go along */
GLushort offset = 1+i*slices; /* triangle_strip indices start at 1 (0 is top vertex), and we advance one stack down as we go along */
for (j=0; j<slices; j++, idx+=2)
{
stripIdx[idx ] = offset+j+slices;
@ -942,12 +945,12 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
glVertexPointer(3, GL_FLOAT, 0, vertices);
glNormalPointer(GL_FLOAT, 0, normals);
/*draw top*/
glDrawElements(GL_TRIANGLE_FAN,slices+2,GL_UNSIGNED_INT,topIdx);
glDrawElements(GL_TRIANGLE_FAN,slices+2,GL_UNSIGNED_SHORT,topIdx);
/*draw stacks*/
for (i=0; i<stacks-2; i++)
glDrawElements(GL_TRIANGLE_STRIP,(slices+1)*2,GL_UNSIGNED_INT,stripIdx+i*(slices+1)*2);
glDrawElements(GL_TRIANGLE_STRIP,(slices+1)*2,GL_UNSIGNED_SHORT,stripIdx+i*(slices+1)*2);
/*draw bottom*/
glDrawElements(GL_TRIANGLE_FAN,slices+2,GL_UNSIGNED_INT,bottomIdx);
glDrawElements(GL_TRIANGLE_FAN,slices+2,GL_UNSIGNED_SHORT,bottomIdx);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
@ -969,7 +972,6 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
/* -- INTERFACE FUNCTIONS ---------------------------------------------- */
#ifndef EGL_VERSION_1_0
/*
* Draws a solid sphere
*/
@ -991,6 +993,7 @@ void FGAPIENTRY glutWireSphere(double radius, GLint slices, GLint stacks)
}
#ifndef EGL_VERSION_1_0
/*
* Draws a solid cone
*/