/*
*
* Copyright 1995, Silicon Graphics, Inc.
* ALL RIGHTS RESERVED
*
* This source code ("Source Code") was originally derived from a
* code base owned by Silicon Graphics, Inc. ("SGI")
*
* LICENSE: SGI grants the user ("Licensee") permission to reproduce,
* distribute, and create derivative works from this Source Code,
* provided that: (1) the user reproduces this entire notice within
* both source and binary format redistributions and any accompanying
* materials such as documentation in printed or electronic format;
* (2) the Source Code is not to be used, or ported or modified for
* use, except in conjunction with OpenGL Performer; and (3) the
* names of Silicon Graphics, Inc. and SGI may not be used in any
* advertising or publicity relating to the Source Code without the
* prior written permission of SGI. No further license or permission
* may be inferred or deemed or construed to exist with regard to the
* Source Code or the code base of which it forms a part. All rights
* not expressly granted are reserved.
*
* This Source Code is provided to Licensee AS IS, without any
* warranty of any kind, either express, implied, or statutory,
* including, but not limited to, any warranty that the Source Code
* will conform to specifications, any implied warranties of
* merchantability, fitness for a particular purpose, and freedom
* from infringement, and any warranty that the documentation will
* conform to the program, or any warranty that the Source Code will
* be error free.
*
* IN NO EVENT WILL SGI BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT
* LIMITED TO DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES,
* ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THE
* SOURCE CODE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT OR
* OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
* PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM,
* OR AROSE OUT OF USE OR RESULTS FROM USE OF, OR LACK OF ABILITY TO
* USE, THE SOURCE CODE.
*
* Contact information: Silicon Graphics, Inc.,
* 1600 Amphitheatre Pkwy, Mountain View, CA 94043,
* or: http:* www.sgi.com
*
*
* shader_test.c: Basic shader test example
*
* $Revision: 1.1 $
* $Date: 2000/11/21 21:39:37 $
*
*/
#include <stdlib.h>
#include <Performer/pf.h>
#include <Performer/pfutil.h>
#include <Performer/pfdu.h>
/*
This function generates a torus with specified inner and outer diamater.
Texture coordinates are generated. No geostate is generated.
*/
pfGeoSet* makeTorus (float rMajor, float rMinor,
int nDivMajor, int nDivMinor)
{
pfGeoSet *gs;
pfVec3 *coords;
pfVec3 *normals;
pfVec2 *texCoords;
int *primLengths;
float x1, y1, z1;
float x2, y2, z2;
float i1, j1, k1;
float i2, j2, k2;
float s1, t1;
float s2, t2;
float theta;
float thetaMin = 0.0;
float thetaMax = 360.0;
float dTheta = (thetaMax - thetaMin) / (float) nDivMajor;
float sinTheta, cosTheta;
float omega;
float omegaMin = 0.0;
float omegaMax = 360.0;
float dOmega = (omegaMax - omegaMin) / (float) nDivMinor;
float sinOmega, cosOmega;
int numStrips = nDivMajor;
int numVertsPerStrip = 2 * (nDivMinor + 1);
int divMaj, divMin;
gs = pfNewGSet(pfGetSharedArena());
coords = (pfVec3*) pfMalloc (sizeof(pfVec3) *
numStrips * numVertsPerStrip,
pfGetSharedArena ());
normals = (pfVec3*) pfMalloc (sizeof(pfVec3) *
numStrips * numVertsPerStrip,
pfGetSharedArena ());
texCoords = (pfVec2*) pfMalloc (sizeof(pfVec3) *
numStrips * numVertsPerStrip,
pfGetSharedArena ());
primLengths = (int*) pfMalloc (sizeof (int) * numStrips,
pfGetSharedArena ());
pfGSetPrimType(gs, PFGS_TRISTRIPS);
pfGSetNumPrims(gs, numStrips);
pfGSetPrimLengths(gs, primLengths);
pfGSetAttr(gs, PFGS_COORD3, PFGS_PER_VERTEX, coords, NULL);
pfGSetAttr(gs, PFGS_NORMAL3, PFGS_PER_VERTEX, normals, NULL);
pfGSetAttr(gs, PFGS_TEXCOORD2, PFGS_PER_VERTEX, texCoords, NULL);
theta = thetaMin;
for (divMaj = 0; divMaj < nDivMajor; divMaj++) {
omega = omegaMin;
primLengths [divMaj] = numVertsPerStrip;
for (divMin = 0; divMin <= nDivMinor; divMin++) {
/* compute all params for first vertex */
pfSinCos (theta, &sinTheta, &cosTheta);
pfSinCos (omega, &sinOmega, &cosOmega);
x1 = cosTheta * (rMajor - rMinor * cosOmega);
y1 = rMinor * sinOmega;
z1 = sinTheta * (rMajor - rMinor * cosOmega);
i1 = x1 - cosTheta * rMajor;
j1 = y1;
k1 = z1 - sinTheta * rMajor;
s1 = (theta - thetaMin) / (thetaMax - thetaMin);
t1 = (omega - omegaMin) / (omegaMax - omegaMin);
/* compute all params for second vertex. it's
one step away in the theta direction. */
pfSinCos (theta + dTheta, &sinTheta, &cosTheta);
x2 = cosTheta * (rMajor - rMinor * cosOmega);
y2 = y1;
z2 = sinTheta * (rMajor - rMinor * cosOmega);
i2 = x2 - cosTheta * rMajor;
j2 = y2;
k2 = z2 - sinTheta * rMajor;
s2 = (theta + dTheta - thetaMin) / (thetaMax - thetaMin);
t2 = t1;
pfSetVec3(coords[divMaj * numVertsPerStrip + 2 * divMin + 0],
x1, y1, z1);
pfSetVec3(coords[divMaj * numVertsPerStrip + 2 * divMin + 1],
x2, y2, z2);
pfSetVec3(normals[divMaj * numVertsPerStrip + 2 * divMin + 0],
i1, j1, k1);
pfSetVec3(normals[divMaj * numVertsPerStrip + 2 * divMin + 1],
i2, j2, k2);
pfSetVec2(texCoords[divMaj * numVertsPerStrip + 2 * divMin + 0],
s1, t1);
pfSetVec2(texCoords[divMaj * numVertsPerStrip + 2 * divMin + 1],
s2, t2);
omega += dOmega;
}
theta += dTheta;
}
return (gs);
}
/*
The frame buffer configuration that will be requested for this
demo
*/
int fbAttrs [] = {
GLX_RGBA,
GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
None
};
int
main (int argc, char *argv[])
{
pfDCS *root;
pfNode *model;
pfScene *scene;
float h = 0;
float p = 0;
float r = 0;
pfSphere bsphere;
pfCoord view;
pfPipe *pipe;
pfPipeWindow *pw;
pfShaderManager *shaderManager;
pfGeoSet *torusGSet;
pfShader *shader1;
pfChannel *chan;
if ((argc < 2) ||
(argc > 3)) {
pfNotify (PFNFY_ALWAYS, PFNFY_PRINT,
"USAGE: %s <shader_file> [<model_file>]\n", argv[0]);
exit (-1);
}
/* Initialize and configure OpenGL Performer */
pfInit();
pfMultiprocess( PFMP_DEFAULT );
if (argc == 3) {
pfdInitConverter (argv[2]);
}
pfConfig();
shaderManager = pfGetShaderManager ();
/* Look for files in PFPATH, ".", and "/usr/share/Performer/data" */
pfFilePath(".:/usr/share/Performer/data:/usr/share/Performer/data/shaders");
/* Create a scene */
scene = pfNewScene();
root = pfNewDCS();
if (argc == 3) {
/* load the specified file */
model = pfdLoadFile (argv[2]);
} else {
/* create a torus */
model = (pfNode *)pfNewGeode();
torusGSet = makeTorus (3, 1, 20, 20);
pfGSetBBox(torusGSet, NULL, PFBOUND_DYNAMIC);
pfAddGSet(model, torusGSet);
}
pfAddChild(root, model);
shader1 = pfdLoadShader (argv[1]);
if (shader1 != NULL) {
pfShaderManagerApplyShader(shaderManager, root, shader1);
pfShaderManagerResolveShaders(shaderManager, root);
} else {
pfNotify (PFNFY_WARN, PFNFY_RESOURCE,
"pfdLoadShader returned NULL shader. Probably due to a "
"parse error.\n");
}
/* add the root to the scene */
pfAddChild(scene, root);
/* Create and configure a pfPipe and pfChannel. */
pipe = pfGetPipe(0);
pw = pfNewPWin(pipe);
pfPWinFBConfigAttrs(pw, fbAttrs);
pfPWinType(pw, PFPWIN_TYPE_X);
pfPWinName(pw, "pfShader Test");
pfPWinOriginSize(pw, 10,10,512,512);
pfOpenPWin(pw);
chan = pfNewChan(pipe);
pfChanFOV(chan, 60.0f, 0.0f);
pfChanScene(chan, scene);
/* Determine extent of scene's geometry. */
pfGetNodeBSphere(root, &bsphere);
pfChanNearFar(chan, 1.0f, 10.0f*bsphere.radius);
/* set view */
pfSetVec3(view.hpr, 0, 0, 0);
pfSetVec3(view.xyz, 0, -15, 0);
pfChanView(chan, view.xyz, view.hpr);
/* rotate model for 1 minute */
while ( pfGetTime() < 60.0f)
{
pfDCSRot(root, h, p, r);
h+=0.25;
p+=0.25;
/* Initiate cull/draw processing for this frame. */
pfFrame();
}
/* Terminate parallel processes and exit. */
pfExit();
return 0;
}
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