Wire Torus now ported
solid torus now as triangle strips, but still need to finish port git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@1267 7f0cb862-5218-0410-a997-914c9d46530a
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dcnieho
parent
fe89b94fc4
commit
21268d0831
@ -1296,7 +1296,7 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
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{
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free(stackIdx);
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free(sliceIdx);
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fgError("Failed to allocate memory in fghGenerateSphere");
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fgError("Failed to allocate memory in fghSphere");
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}
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/* generate for each stack */
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@ -1356,7 +1356,7 @@ static void fghSphere( double radius, GLint slices, GLint stacks, GLboolean useW
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if (!(stripIdx))
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{
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free(stripIdx);
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fgError("Failed to allocate memory in fghGenerateSphere");
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fgError("Failed to allocate memory in fghSphere");
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}
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/* top stack */
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@ -1443,7 +1443,7 @@ static void fghCone( double base, double height, GLint slices, GLint stacks, GLb
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{
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free(stackIdx);
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free(sliceIdx);
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fgError("Failed to allocate memory in fghGenerateCone");
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fgError("Failed to allocate memory in fghCone");
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}
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/* generate for each stack */
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@ -1498,7 +1498,7 @@ static void fghCone( double base, double height, GLint slices, GLint stacks, GLb
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if (!(stripIdx))
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{
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free(stripIdx);
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fgError("Failed to allocate memory in fghGenerateCone");
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fgError("Failed to allocate memory in fghCone");
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}
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/* top stack */
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@ -1574,7 +1574,7 @@ static void fghCylinder( double radius, double height, GLint slices, GLint stack
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{
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free(stackIdx);
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free(sliceIdx);
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fgError("Failed to allocate memory in fghGenerateCylinder");
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fgError("Failed to allocate memory in fghCylinder");
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}
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/* generate for each stack */
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@ -1629,7 +1629,7 @@ static void fghCylinder( double radius, double height, GLint slices, GLint stack
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if (!(stripIdx))
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{
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free(stripIdx);
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fgError("Failed to allocate memory in fghGenerateCylinder");
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fgError("Failed to allocate memory in fghCylinder");
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}
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/* top stack */
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@ -1688,6 +1688,104 @@ static void fghCylinder( double radius, double height, GLint slices, GLint stack
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free(normals);
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}
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static void fghTorus( double dInnerRadius, double dOuterRadius, GLint nSides, GLint nRings, GLboolean useWireMode )
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{
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int i,j,idx, nVert;
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GLfloat *vertices, *normals;
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/* Generate vertices and normals */
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fghGenerateTorus((GLfloat)dInnerRadius,(GLfloat)dOuterRadius,nSides,nRings, &vertices,&normals,&nVert);
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if (nVert==0)
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/* nothing to draw */
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return;
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if (useWireMode)
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{
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GLushort *sideIdx, *ringIdx;
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/* First, generate vertex index arrays for drawing with glDrawElements
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* We have a bunch of line_loops to draw each side, and a
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* bunch for each ring.
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*/
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ringIdx = malloc(nRings*nSides*sizeof(GLushort));
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sideIdx = malloc(nSides*nRings*sizeof(GLushort));
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if (!(ringIdx) || !(sideIdx))
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{
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free(ringIdx);
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free(sideIdx);
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fgError("Failed to allocate memory in fghTorus");
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}
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/* generate for each ring */
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for( j=0,idx=0; j<nRings; j++ )
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for( i=0; i<nSides; i++, idx++ )
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ringIdx[idx] = j * nSides + i;
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/* generate for each side */
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for( i=0,idx=0; i<nSides; i++ )
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for( j=0; j<nRings; j++, idx++ )
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sideIdx[idx] = j * nSides + i;
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/* draw */
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_NORMAL_ARRAY);
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glVertexPointer(3, GL_FLOAT, 0, vertices);
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glNormalPointer(GL_FLOAT, 0, normals);
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/*draw rings*/
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for( i=0; i<nSides; i++ )
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glDrawElements(GL_LINE_LOOP,nRings,GL_UNSIGNED_SHORT,ringIdx+i*nRings);
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/*draw sides*/
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for (i=0; i<nRings; i++)
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glDrawElements(GL_LINE_LOOP,nSides,GL_UNSIGNED_SHORT,sideIdx+i*nSides);
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_NORMAL_ARRAY);
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/* cleanup allocated memory */
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free(sideIdx);
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free(ringIdx);
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}
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else
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{
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/* clearly, this branch is TODO */
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/* First, generate vertex index arrays for drawing with glDrawElements
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* All stacks, including top and bottom are covered with a triangle
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* strip.
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*/
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GLushort *stripIdx;
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/* Allocate buffers for indices, bail out if memory allocation fails */
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//stripIdx = malloc((slices+1)*2*(stacks+2)*sizeof(GLushort));
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if (!(stripIdx))
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{
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free(stripIdx);
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fgError("Failed to allocate memory in fghTorus");
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}
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/* draw */
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_NORMAL_ARRAY);
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glVertexPointer(3, GL_FLOAT, 0, vertices);
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glNormalPointer(GL_FLOAT, 0, normals);
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/*draw stacks*/
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//for (i=0; i<stacks+2; i++)
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// glDrawElements(GL_TRIANGLE_STRIP,(slices+1)*2,GL_UNSIGNED_SHORT,stripIdx+i*(slices+1)*2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_NORMAL_ARRAY);
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/* cleanup allocated memory */
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free(stripIdx);
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}
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/* cleanup allocated memory */
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free(vertices);
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free(normals);
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}
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/* -- INTERFACE FUNCTIONS ---------------------------------------------- */
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@ -1761,47 +1859,9 @@ void FGAPIENTRY glutWireCylinder(double radius, double height, GLint slices, GLi
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*/
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void FGAPIENTRY glutWireTorus( double dInnerRadius, double dOuterRadius, GLint nSides, GLint nRings )
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{
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GLfloat *vertex, *normal;
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int i, j, nVert;
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FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireTorus" );
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fghGenerateTorus(
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dInnerRadius, dOuterRadius, nSides, nRings, /* input */
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&vertex, &normal, &nVert /* output */
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);
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for( i=0; i<nSides; i++ )
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{
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glBegin( GL_LINE_LOOP );
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for( j=0; j<nRings; j++ )
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{
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int offset = 3 * ( j * nSides + i ) ;
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glNormal3fv( normal + offset );
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glVertex3fv( vertex + offset );
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}
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glEnd();
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}
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for( j=0; j<nRings; j++ )
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{
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glBegin(GL_LINE_LOOP);
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for( i=0; i<nSides; i++ )
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{
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int offset = 3 * ( j * nSides + i ) ;
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glNormal3fv( normal + offset );
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glVertex3fv( vertex + offset );
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}
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glEnd();
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}
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free ( vertex ) ;
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free ( normal ) ;
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fghTorus(dInnerRadius, dOuterRadius, nSides, nRings, TRUE);
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}
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/*
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@ -1816,17 +1876,17 @@ void FGAPIENTRY glutSolidTorus( double dInnerRadius, double dOuterRadius, GLint
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fghGenerateTorus(
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dInnerRadius, dOuterRadius, nSides, nRings, /* input */
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dInnerRadius, dOuterRadius, nSides, nRings, /* input */
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&vertex, &normal, &nVert /* output */
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);
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glBegin( GL_QUADS );
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for( i=0; i<nSides; i++ )
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{
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int ioff = 3;
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if (i==nSides-1)
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ioff = -i*3;
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glBegin( GL_TRIANGLE_STRIP );
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for( j=0; j<nRings; j++ )
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{
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int offset = 3 * ( j * nSides + i ) ;
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@ -1836,14 +1896,14 @@ void FGAPIENTRY glutSolidTorus( double dInnerRadius, double dOuterRadius, GLint
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glVertex3fv( vertex + offset + ioff );
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offset = 3 * ( ((j+1)%nRings) * nSides + i) ;
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glNormal3fv( normal + offset + ioff );
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glVertex3fv( vertex + offset + ioff );
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glNormal3fv( normal + offset );
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glVertex3fv( vertex + offset );
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glNormal3fv( normal + offset + ioff );
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glVertex3fv( vertex + offset + ioff );
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}
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glEnd();
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}
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glEnd();
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free ( vertex ) ;
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free ( normal ) ;
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