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WindowsXP/multimedia/opengl/test/simple/rgb/mfgls/surfgrid.c
Tanishq Dubey cb60ae51e5
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2025-04-27 07:49:33 -04:00

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/*
* surfgrid.c - simple test of polygon offset
*
* $Revision: 1.3 $
*
* usage:
* surfgrid [-f]
*
* options:
* -f run on full screen
*
* keys:
* p toggle polygon offset
* m toggle multisampling
* S increase polygon offset factor
* s decrease polygon offset factor
* B increase polygon offset bias
* b decrease polygon offset bias
* g toggle grid drawing
* t toggle surface drawing
* f toggle smooth/flat shading
* n toggle whether to use GL evaluators or GLU nurbs
* u decr number of segments in U direction
* U incr number of segments in U direction
* v decr number of segments in V direction
* V incr number of segments in V direction
* escape quit
*/
#include "pch.c"
#pragma hdrstop
#include <math.h>
#define W 600
#define H 600
static GLfloat controlpts[] =
{
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 3.0f, 0.0f, 1.0f, 2.0f,
3.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f, 8.0f, 0.0f, 0.0f, 4.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 3.0f, 0.0f,-1.0f, 2.0f,
3.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f, 4.0f, 0.0f, 0.0f, 4.0f,
2.0f,-2.0f, 0.0f, 2.0f, 1.0f,-1.0f, 0.5f, 1.0f, 1.5f,-1.5f, 0.5f, 1.0f,
1.5f,-1.5f, 0.5f, 1.0f, 2.0f,-2.0f, 0.5f, 1.0f, 4.0f,-4.0f, 0.0f, 2.0f,
4.0f,-4.0f, 0.0f, 2.0f, 2.0f,-2.0f,-0.5f, 1.0f, 1.5f,-1.5f,-0.5f, 1.0f,
1.5f,-1.5f,-0.5f, 1.0f, 1.0f,-1.0f,-0.5f, 1.0f, 2.0f,-2.0f, 0.0f, 2.0f,
0.0f,-2.0f, 0.0f, 2.0f, 0.0f,-1.0f, 0.5f, 1.0f, 0.0f,-1.5f, 0.5f, 1.0f,
0.0f,-1.5f, 0.5f, 1.0f, 0.0f,-2.0f, 0.5f, 1.0f, 0.0f,-4.0f, 0.0f, 2.0f,
0.0f,-4.0f, 0.0f, 2.0f, 0.0f,-2.0f,-0.5f, 1.0f, 0.0f,-1.5f,-0.5f, 1.0f,
0.0f,-1.5f,-0.5f, 1.0f, 0.0f,-1.0f,-0.5f, 1.0f, 0.0f,-2.0f, 0.0f, 2.0f,
0.0f,-2.0f, 0.0f, 2.0f, 0.0f,-1.0f, 0.5f, 1.0f, 0.0f,-1.5f, 0.5f, 1.0f,
0.0f,-1.5f, 0.5f, 1.0f, 0.0f,-2.0f, 0.5f, 1.0f, 0.0f,-4.0f, 0.0f, 2.0f,
0.0f,-4.0f, 0.0f, 2.0f, 0.0f,-2.0f,-0.5f, 1.0f, 0.0f,-1.5f,-0.5f, 1.0f,
0.0f,-1.5f,-0.5f, 1.0f, 0.0f,-1.0f,-0.5f, 1.0f, 0.0f,-2.0f, 0.0f, 2.0f,
-2.0f,-2.0f, 0.0f, 2.0f,-1.0f,-1.0f, 0.5f, 1.0f,-1.5f,-1.5f, 0.5f, 1.0f,
-1.5f,-1.5f, 0.5f, 1.0f,-2.0f,-2.0f, 0.5f, 1.0f,-4.0f,-4.0f, 0.0f, 2.0f,
-4.0f,-4.0f, 0.0f, 2.0f,-2.0f,-2.0f,-0.5f, 1.0f,-1.5f,-1.5f,-0.5f, 1.0f,
-1.5f,-1.5f,-0.5f, 1.0f,-1.0f,-1.0f,-0.5f, 1.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-3.0f, 0.0f, 1.0f, 2.0f,
-3.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,-8.0f, 0.0f, 0.0f, 4.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-3.0f, 0.0f,-1.0f, 2.0f,
-3.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,-4.0f, 0.0f, 0.0f, 4.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-3.0f, 0.0f, 1.0f, 2.0f,
-3.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,-8.0f, 0.0f, 0.0f, 4.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-3.0f, 0.0f,-1.0f, 2.0f,
-3.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,-4.0f, 0.0f, 0.0f, 4.0f,
-2.0f, 2.0f, 0.0f, 2.0f,-1.0f, 1.0f, 0.5f, 1.0f,-1.5f, 1.5f, 0.5f, 1.0f,
-1.5f, 1.5f, 0.5f, 1.0f,-2.0f, 2.0f, 0.5f, 1.0f,-4.0f, 4.0f, 0.0f, 2.0f,
-4.0f, 4.0f, 0.0f, 2.0f,-2.0f, 2.0f,-0.5f, 1.0f,-1.5f, 1.5f,-0.5f, 1.0f,
-1.5f, 1.5f,-0.5f, 1.0f,-1.0f, 1.0f,-0.5f, 1.0f,-2.0f, 2.0f, 0.0f, 2.0f,
0.0f, 2.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.5f, 1.0f, 0.0f, 1.5f, 0.5f, 1.0f,
0.0f, 1.5f, 0.5f, 1.0f, 0.0f, 2.0f, 0.5f, 1.0f, 0.0f, 4.0f, 0.0f, 2.0f,
0.0f, 4.0f, 0.0f, 2.0f, 0.0f, 2.0f,-0.5f, 1.0f, 0.0f, 1.5f,-0.5f, 1.0f,
0.0f, 1.5f,-0.5f, 1.0f, 0.0f, 1.0f,-0.5f, 1.0f, 0.0f, 2.0f, 0.0f, 2.0f,
0.0f, 2.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.5f, 1.0f, 0.0f, 1.5f, 0.5f, 1.0f,
0.0f, 1.5f, 0.5f, 1.0f, 0.0f, 2.0f, 0.5f, 1.0f, 0.0f, 4.0f, 0.0f, 2.0f,
0.0f, 4.0f, 0.0f, 2.0f, 0.0f, 2.0f,-0.5f, 1.0f, 0.0f, 1.5f,-0.5f, 1.0f,
0.0f, 1.5f,-0.5f, 1.0f, 0.0f, 1.0f,-0.5f, 1.0f, 0.0f, 2.0f, 0.0f, 2.0f,
2.0f, 2.0f, 0.0f, 2.0f, 1.0f, 1.0f, 0.5f, 1.0f, 1.5f, 1.5f, 0.5f, 1.0f,
1.5f, 1.5f, 0.5f, 1.0f, 2.0f, 2.0f, 0.5f, 1.0f, 4.0f, 4.0f, 0.0f, 2.0f,
4.0f, 4.0f, 0.0f, 2.0f, 2.0f, 2.0f,-0.5f, 1.0f, 1.5f, 1.5f,-0.5f, 1.0f,
1.5f, 1.5f,-0.5f, 1.0f, 1.0f, 1.0f,-0.5f, 1.0f, 2.0f, 2.0f, 0.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 3.0f, 0.0f, 1.0f, 2.0f,
3.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f, 8.0f, 0.0f, 0.0f, 4.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 3.0f, 0.0f,-1.0f, 2.0f,
3.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f, 4.0f, 0.0f, 0.0f, 4.0f,
};
static GLfloat nurbctlpts[] = {
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f,-2.0f, 0.0f, 2.0f, 1.0f,-1.0f, 0.5f, 1.0f,
2.0f,-2.0f, 0.5f, 1.0f, 4.0f,-4.0f, 0.0f, 2.0f, 2.0f,-2.0f,-0.5f, 1.0f,
1.0f,-1.0f,-0.5f, 1.0f, 2.0f,-2.0f, 0.0f, 2.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-1.0f,-1.0f, 0.5f, 1.0f,-2.0f,-2.0f, 0.5f, 1.0f,-4.0f,-4.0f, 0.0f, 2.0f,
-2.0f,-2.0f,-0.5f, 1.0f,-1.0f,-1.0f,-0.5f, 1.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 2.0f, 0.0f, 2.0f,-1.0f, 1.0f, 0.5f, 1.0f,
-2.0f, 2.0f, 0.5f, 1.0f,-4.0f, 4.0f, 0.0f, 2.0f,-2.0f, 2.0f,-0.5f, 1.0f,
-1.0f, 1.0f,-0.5f, 1.0f,-2.0f, 2.0f, 0.0f, 2.0f, 2.0f, 2.0f, 0.0f, 2.0f,
1.0f, 1.0f, 0.5f, 1.0f, 2.0f, 2.0f, 0.5f, 1.0f, 4.0f, 4.0f, 0.0f, 2.0f,
2.0f, 2.0f,-0.5f, 1.0f, 1.0f, 1.0f,-0.5f, 1.0f, 2.0f, 2.0f, 0.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f,
};
/*
* Misc vector op routines.
*/
float x_axis[] = { 1.0f, 0.0f, 0.0f };
float y_axis[] = { 0.0f, 1.0f, 0.0f };
float z_axis[] = { 0.0f, 0.0f, 1.0f };
float nx_axis[] = { -1.0f, 0.0f, 0.0f };
float ny_axis[] = { 0.0f, -1.0f, 0.0f };
float nz_axis[] = { 0.0f, 0.0f, -1.0f };
void norm(float v[3])
{
float r;
r = (float)sqrt( v[0]*v[0] + v[1]*v[1] + v[2]*v[2] );
v[0] /= r;
v[1] /= r;
v[2] /= r;
}
float dot(float a[3], float b[3])
{
return (a[0]*b[0] + a[1]*b[1] + a[2]*b[2]);
}
void cross(float v1[3], float v2[3], float result[3])
{
result[0] = v1[1]*v2[2] - v1[2]*v2[1];
result[1] = v1[2]*v2[0] - v1[0]*v2[2];
result[2] = v1[0]*v2[1] - v1[1]*v2[0];
}
float length(float v[3])
{
float r = (float)sqrt( v[0]*v[0] + v[1]*v[1] + v[2]*v[2] );
return r;
}
static long winwidth = W, winheight = H;
GLUnurbsObj *nobj;
GLuint surflist, gridlist;
int useglunurbs = 0;
int smooth = 1;
int tracking = 0;
int showgrid = 1;
int showsurf = 1;
int fullscreen = 0;
int multisampling = 0;
float modelmatrix[16];
float scale = 0.5f;
float bias = 0.002f;
int usegments = 4;
int vsegments = 4;
int spindx, spindy;
int startx, starty;
int curx, cury;
void redraw(void);
void createlists(void);
float torusnurbpts[];
float torusbezierpts[];
void reshape_proc(GLsizei w, GLsizei h)
{
int size;
winwidth = w;
winheight = h;
size = (winwidth < winheight ? winwidth : winheight);
glViewport((winwidth-size)/2, (winheight-size)/2, size, size);
}
void gridmaterials(void)
{
static float front_mat_diffuse[] = { 1.0f, 1.0f, 0.4f, 1.0f };
static float front_mat_ambient[] = { 0.1f, 0.1f, 0.1f, 1.0f };
static float back_mat_diffuse[] = { 1.0f, 0.0f, 0.0f, 1.0f };
static float back_mat_ambient[] = { 0.1f, 0.1f, 0.1f, 1.0f };
glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
glMaterialfv(GL_FRONT, GL_AMBIENT, front_mat_ambient);
glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
glMaterialfv(GL_BACK, GL_AMBIENT, back_mat_ambient);
}
void surfacematerials(void)
{
static float front_mat_diffuse[] = { 0.2f, 0.7f, 0.4f, 1.0f };
static float front_mat_ambient[] = { 0.1f, 0.1f, 0.1f, 1.0f };
static float back_mat_diffuse[] = { 1.0f, 1.0f, 0.2f, 1.0f };
static float back_mat_ambient[] = { 0.1f, 0.1f, 0.1f, 1.0f };
glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
glMaterialfv(GL_FRONT, GL_AMBIENT, front_mat_ambient);
glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
glMaterialfv(GL_BACK, GL_AMBIENT, back_mat_ambient);
}
void init(void)
{
static float ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
static float diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
static float position[] = { 90.0f, 90.0f, -150.0f, 0.0f };
static float lmodel_ambient[] = { 1.0f, 1.0f, 1.0f, 1.0f };
static float lmodel_twoside[] = { (float)GL_TRUE };
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective( 40.0, 1.0, 2.0, 200.0 );
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glGetFloatv(GL_MODELVIEW_MATRIX, modelmatrix);
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, position);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
glEnable(GL_AUTO_NORMAL);
#ifdef GL_POLYGON_OFFSET_EXT
glEnable(GL_POLYGON_OFFSET_EXT);
#endif
glFrontFace(GL_CCW);
glEnable( GL_MAP2_VERTEX_4 );
glClearColor(0.25f, 0.25f, 0.5f, 0.0f);
#ifdef GL_POLYGON_OFFSET_EXT
glPolygonOffsetEXT( scale, bias );
#endif
nobj = gluNewNurbsRenderer();
gluNurbsProperty(nobj, GLU_SAMPLING_METHOD, (float)GLU_DOMAIN_DISTANCE );
surflist = glGenLists(1);
gridlist = glGenLists(1);
createlists();
}
void drawmesh(void)
{
int i, j;
float *p;
int up2p = 4;
int uorder = 3, vorder = 3;
int nu = 4, nv = 4;
int vp2p = up2p * uorder * nu;
for (j=0; j < nv; j++) {
for (i=0; i < nu; i++) {
p = torusbezierpts + (j * vp2p * vorder) + (i * up2p * uorder);
#ifdef GL_POLYGON_OFFSET_EXT
glPolygonOffsetEXT( scale, bias );
#endif
glMap2f( GL_MAP2_VERTEX_4, 0.0f, 1.0f, up2p, 3, 0.0f, 1.0f, vp2p, 3,
(void*)p );
if (showsurf) {
surfacematerials();
glEvalMesh2( GL_FILL, 0, usegments, 0, vsegments );
}
if (showgrid) {
gridmaterials();
glEvalMesh2( GL_LINE, 0, usegments, 0, vsegments );
}
}
}
}
void redraw(void)
{
static int i=0;
int dx, dy;
float v[3], rot[3];
float len, ang;
static GLuint vcount;
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glColor3f( 1.0f, 0.0f, 0.0f);
if (tracking) {
dx = curx - startx;
dy = cury - starty;
} else {
dx = spindx;
dy = spindy;
}
if (dx || dy) {
dy = -dy;
v[0] = (float)dx;
v[1] = (float)dy;
v[2] = 0.0f;
len = length(v);
ang = -len / 600 * 360;
norm( v );
cross( v, z_axis, rot );
/*
** This is certainly not recommended for programs that care
** about performance or numerical stability: we concatenate
** the rotation onto the current modelview matrix and read the
** matrix back, thus saving ourselves from writing our own
** matrix manipulation routines.
*/
glLoadIdentity();
glRotatef(ang, rot[0], rot[1], rot[2]);
glMultMatrixf(modelmatrix);
glGetFloatv(GL_MODELVIEW_MATRIX, modelmatrix);
}
glLoadIdentity();
glTranslatef( 0.0f, 0.0f, -10.0f );
glMultMatrixf(modelmatrix);
if (useglunurbs) {
if (showsurf) glCallList(surflist);
if (showgrid) glCallList(gridlist);
} else {
glMapGrid2f( usegments, 0.0f, 1.0f, vsegments, 0.0f, 1.0f );
drawmesh();
}
}
static void OglBounds(int *w, int *h)
{
*w = W;
*h = H;
}
static void OglDraw(int w, int h)
{
init();
reshape_proc(w, h);
redraw();
}
/****************************************************************************/
float circleknots[] = { 0.0f, 0.0f, 0.0f, 0.25f, 0.50f, 0.50f, 0.75f, 1.0f,
1.0f, 1.0f };
void createlists(void)
{
gluNurbsProperty(nobj, GLU_U_STEP, (usegments-1)*4.0f );
gluNurbsProperty(nobj, GLU_V_STEP, (vsegments-1)*4.0f );
gluNurbsProperty(nobj, GLU_DISPLAY_MODE, (float)GLU_FILL);
glNewList(surflist, GL_COMPILE);
surfacematerials();
gluBeginSurface(nobj);
gluNurbsSurface(nobj, 10, circleknots, 10, circleknots,
4, 28, torusnurbpts, 3, 3, GL_MAP2_VERTEX_4);
gluEndSurface(nobj);
glEndList();
gluNurbsProperty(nobj, GLU_DISPLAY_MODE, (float)GLU_OUTLINE_POLYGON);
glNewList(gridlist, GL_COMPILE);
gridmaterials();
gluBeginSurface(nobj);
gluNurbsSurface(nobj, 10, circleknots, 10, circleknots,
4, 28, torusnurbpts, 3, 3, GL_MAP2_VERTEX_4);
gluEndSurface(nobj);
glEndList();
}
/****************************************************************************/
/*
* Control points of the torus in Bezier form. Can be rendered
* using OpenGL evaluators.
*/
static GLfloat torusbezierpts[] = {
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 3.0f, 0.0f, 1.0f, 2.0f,
3.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f, 8.0f, 0.0f, 0.0f, 4.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 3.0f, 0.0f,-1.0f, 2.0f,
3.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f, 4.0f, 0.0f, 0.0f, 4.0f,
2.0f,-2.0f, 0.0f, 2.0f, 1.0f,-1.0f, 0.5f, 1.0f, 1.5f,-1.5f, 0.5f, 1.0f,
1.5f,-1.5f, 0.5f, 1.0f, 2.0f,-2.0f, 0.5f, 1.0f, 4.0f,-4.0f, 0.0f, 2.0f,
4.0f,-4.0f, 0.0f, 2.0f, 2.0f,-2.0f,-0.5f, 1.0f, 1.5f,-1.5f,-0.5f, 1.0f,
1.5f,-1.5f,-0.5f, 1.0f, 1.0f,-1.0f,-0.5f, 1.0f, 2.0f,-2.0f, 0.0f, 2.0f,
0.0f,-2.0f, 0.0f, 2.0f, 0.0f,-1.0f, 0.5f, 1.0f, 0.0f,-1.5f, 0.5f, 1.0f,
0.0f,-1.5f, 0.5f, 1.0f, 0.0f,-2.0f, 0.5f, 1.0f, 0.0f,-4.0f, 0.0f, 2.0f,
0.0f,-4.0f, 0.0f, 2.0f, 0.0f,-2.0f,-0.5f, 1.0f, 0.0f,-1.5f,-0.5f, 1.0f,
0.0f,-1.5f,-0.5f, 1.0f, 0.0f,-1.0f,-0.5f, 1.0f, 0.0f,-2.0f, 0.0f, 2.0f,
0.0f,-2.0f, 0.0f, 2.0f, 0.0f,-1.0f, 0.5f, 1.0f, 0.0f,-1.5f, 0.5f, 1.0f,
0.0f,-1.5f, 0.5f, 1.0f, 0.0f,-2.0f, 0.5f, 1.0f, 0.0f,-4.0f, 0.0f, 2.0f,
0.0f,-4.0f, 0.0f, 2.0f, 0.0f,-2.0f,-0.5f, 1.0f, 0.0f,-1.5f,-0.5f, 1.0f,
0.0f,-1.5f,-0.5f, 1.0f, 0.0f,-1.0f,-0.5f, 1.0f, 0.0f,-2.0f, 0.0f, 2.0f,
-2.0f,-2.0f, 0.0f, 2.0f,-1.0f,-1.0f, 0.5f, 1.0f,-1.5f,-1.5f, 0.5f, 1.0f,
-1.5f,-1.5f, 0.5f, 1.0f,-2.0f,-2.0f, 0.5f, 1.0f,-4.0f,-4.0f, 0.0f, 2.0f,
-4.0f,-4.0f, 0.0f, 2.0f,-2.0f,-2.0f,-0.5f, 1.0f,-1.5f,-1.5f,-0.5f, 1.0f,
-1.5f,-1.5f,-0.5f, 1.0f,-1.0f,-1.0f,-0.5f, 1.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-3.0f, 0.0f, 1.0f, 2.0f,
-3.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,-8.0f, 0.0f, 0.0f, 4.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-3.0f, 0.0f,-1.0f, 2.0f,
-3.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,-4.0f, 0.0f, 0.0f, 4.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-3.0f, 0.0f, 1.0f, 2.0f,
-3.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,-8.0f, 0.0f, 0.0f, 4.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-3.0f, 0.0f,-1.0f, 2.0f,
-3.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,-4.0f, 0.0f, 0.0f, 4.0f,
-2.0f, 2.0f, 0.0f, 2.0f,-1.0f, 1.0f, 0.5f, 1.0f,-1.5f, 1.5f, 0.5f, 1.0f,
-1.5f, 1.5f, 0.5f, 1.0f,-2.0f, 2.0f, 0.5f, 1.0f,-4.0f, 4.0f, 0.0f, 2.0f,
-4.0f, 4.0f, 0.0f, 2.0f,-2.0f, 2.0f,-0.5f, 1.0f,-1.5f, 1.5f,-0.5f, 1.0f,
-1.5f, 1.5f,-0.5f, 1.0f,-1.0f, 1.0f,-0.5f, 1.0f,-2.0f, 2.0f, 0.0f, 2.0f,
0.0f, 2.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.5f, 1.0f, 0.0f, 1.5f, 0.5f, 1.0f,
0.0f, 1.5f, 0.5f, 1.0f, 0.0f, 2.0f, 0.5f, 1.0f, 0.0f, 4.0f, 0.0f, 2.0f,
0.0f, 4.0f, 0.0f, 2.0f, 0.0f, 2.0f,-0.5f, 1.0f, 0.0f, 1.5f,-0.5f, 1.0f,
0.0f, 1.5f,-0.5f, 1.0f, 0.0f, 1.0f,-0.5f, 1.0f, 0.0f, 2.0f, 0.0f, 2.0f,
0.0f, 2.0f, 0.0f, 2.0f, 0.0f, 1.0f, 0.5f, 1.0f, 0.0f, 1.5f, 0.5f, 1.0f,
0.0f, 1.5f, 0.5f, 1.0f, 0.0f, 2.0f, 0.5f, 1.0f, 0.0f, 4.0f, 0.0f, 2.0f,
0.0f, 4.0f, 0.0f, 2.0f, 0.0f, 2.0f,-0.5f, 1.0f, 0.0f, 1.5f,-0.5f, 1.0f,
0.0f, 1.5f,-0.5f, 1.0f, 0.0f, 1.0f,-0.5f, 1.0f, 0.0f, 2.0f, 0.0f, 2.0f,
2.0f, 2.0f, 0.0f, 2.0f, 1.0f, 1.0f, 0.5f, 1.0f, 1.5f, 1.5f, 0.5f, 1.0f,
1.5f, 1.5f, 0.5f, 1.0f, 2.0f, 2.0f, 0.5f, 1.0f, 4.0f, 4.0f, 0.0f, 2.0f,
4.0f, 4.0f, 0.0f, 2.0f, 2.0f, 2.0f,-0.5f, 1.0f, 1.5f, 1.5f,-0.5f, 1.0f,
1.5f, 1.5f,-0.5f, 1.0f, 1.0f, 1.0f,-0.5f, 1.0f, 2.0f, 2.0f, 0.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 3.0f, 0.0f, 1.0f, 2.0f,
3.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f, 8.0f, 0.0f, 0.0f, 4.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 3.0f, 0.0f,-1.0f, 2.0f,
3.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f, 4.0f, 0.0f, 0.0f, 4.0f,
};
/*
* Control points of a torus in NURBS form. Can be rendered using
* the GLU NURBS routines.
*/
static GLfloat torusnurbpts[] = {
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f,-2.0f, 0.0f, 2.0f, 1.0f,-1.0f, 0.5f, 1.0f,
2.0f,-2.0f, 0.5f, 1.0f, 4.0f,-4.0f, 0.0f, 2.0f, 2.0f,-2.0f,-0.5f, 1.0f,
1.0f,-1.0f,-0.5f, 1.0f, 2.0f,-2.0f, 0.0f, 2.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-1.0f,-1.0f, 0.5f, 1.0f,-2.0f,-2.0f, 0.5f, 1.0f,-4.0f,-4.0f, 0.0f, 2.0f,
-2.0f,-2.0f,-0.5f, 1.0f,-1.0f,-1.0f,-0.5f, 1.0f,-2.0f,-2.0f, 0.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 0.0f, 1.0f, 2.0f,-4.0f, 0.0f, 1.0f, 2.0f,
-8.0f, 0.0f, 0.0f, 4.0f,-4.0f, 0.0f,-1.0f, 2.0f,-2.0f, 0.0f,-1.0f, 2.0f,
-4.0f, 0.0f, 0.0f, 4.0f,-2.0f, 2.0f, 0.0f, 2.0f,-1.0f, 1.0f, 0.5f, 1.0f,
-2.0f, 2.0f, 0.5f, 1.0f,-4.0f, 4.0f, 0.0f, 2.0f,-2.0f, 2.0f,-0.5f, 1.0f,
-1.0f, 1.0f,-0.5f, 1.0f,-2.0f, 2.0f, 0.0f, 2.0f, 2.0f, 2.0f, 0.0f, 2.0f,
1.0f, 1.0f, 0.5f, 1.0f, 2.0f, 2.0f, 0.5f, 1.0f, 4.0f, 4.0f, 0.0f, 2.0f,
2.0f, 2.0f,-0.5f, 1.0f, 1.0f, 1.0f,-0.5f, 1.0f, 2.0f, 2.0f, 0.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f, 2.0f, 0.0f, 1.0f, 2.0f, 4.0f, 0.0f, 1.0f, 2.0f,
8.0f, 0.0f, 0.0f, 4.0f, 4.0f, 0.0f,-1.0f, 2.0f, 2.0f, 0.0f,-1.0f, 2.0f,
4.0f, 0.0f, 0.0f, 4.0f,
};
OglModule oglmod_surfgrid =
{
"surfgrid",
NULL,
OglBounds,
NULL,
OglDraw
};
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