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NV20VolRen.cpp
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//////////////////////////////////////////////////////////////////////
// ________ ____ ___
// | \ / | / /
// +---+ \/ |/ /
// +--+| |\ /| <
// | || | \ / | |\ \
// | | \/ | | \ \
// \_____| |__| \__\
// Copyright 2001
// Joe Michael Kniss
// <<<[email protected]>>>
// "All Your Base are Belong to Us"
//
//
// NV20VolRen.cpp: implementation of the NV20VolRen class.
//
//////////////////////////////////////////////////////////////////////
#include "NV20VolRen.h"
#include <iostream.h>
#include <GL/glExt.h>
#include "VectorMath.h"
//========== NOTES ===========================================
// Standard brick vertex ordering:
//
// (011) (111)
// 6 +---------+ 7 Where 1's are the size of the brick
// /| /| allong that axis
// / | / |
// (001)/ |(101) / |
// 4 +---------+ 5 |
// | | | |(110) z axis
// | 2 +-----+---+ 3 ^
// | /(010) | / | y axis
// | / | / | /
// |/ |/ |/
// 0 +---------+ 1 +-------> x axis
// (000) (100)
//
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
NV20VolRen::NV20VolRen()
{
texNames2D = 0;
sx = sy = sz = 0;
if(gluvv.mv){
vcoords[0][0] = vcoords[0][1] = vcoords[0][2] = 0;
vcoords[1][0] = gluvv.mv->xfSize; vcoords[1][1] = vcoords[1][2] = 0;
vcoords[2][0] = 0; vcoords[2][1] = gluvv.mv->yfSize; vcoords[2][2] = 0;
vcoords[3][0] = gluvv.mv->xfSize; vcoords[3][1] = gluvv.mv->yfSize; vcoords[3][2] = 0;
vcoords[4][0] = vcoords[4][1] = 0; vcoords[4][2] = gluvv.mv->zfSize;
vcoords[5][0] = gluvv.mv->xfSize; vcoords[5][1] = 0; vcoords[5][2] = gluvv.mv->zfSize;
vcoords[6][0] = 0; vcoords[6][1] = gluvv.mv->yfSize; vcoords[6][2] = gluvv.mv->zfSize;
vcoords[7][0] = gluvv.mv->xfSize;
vcoords[7][1] = gluvv.mv->yfSize; vcoords[7][2] = gluvv.mv->zfSize;
texts[0][0] = texts[1][0] = texts[2][0] = 0;
texts[0][1] = texts[1][1] = texts[2][1] = 1;
vexts[0][0] = vexts[1][0] = vexts[2][0] = 0;
vexts[0][1] = gluvv.mv->xfSize;
vexts[1][1] = gluvv.mv->yfSize;
vexts[2][1] = gluvv.mv->zfSize;
}
}
NV20VolRen::~NV20VolRen()
{
}
//================================================================= INIT
//======================================================================
void NV20VolRen::init()
{
if(gluvv.mv){
create2DTextures(gluvv.mv);
create2DDepTex();
createTempTex();
//we should select pbuffer size based on the size of the largest slice extents
if(!(pbuff = new PBuffer(512, 512, GLUT_SINGLE | GLUT_RGBA))){
cerr << "ERROR: PBuffer intialization failed!" << endl;
} else {
pbuff->Initialize(true);
pbuff->MakeCurrent();
glClearColor( 0.0, 0.0, 0.0, 0.0 );
glMatrixMode( GL_PROJECTION );
glOrtho(0,512,0,512,1,3);
glMatrixMode(GL_MODELVIEW);
gluLookAt(0,0,2,
0,0,0,
0,1,0);
MakeCurrent();
cerr << "PBuffer intialization succeded" << endl;
}
}
}
//=============================================================== DRAW !
//======================================================================
void NV20VolRen::draw()
{
if(!texNames2D) return;
//interpSlices();
//drawSlices();
drawVolume();
}
//========================================================== Draw Volume
//======================================================================
void NV20VolRen::drawVolume()
{
//double mv0[16];
glPushMatrix();{
//--------------- set up transformation -------------------------------
glGetDoublev(GL_MODELVIEW_MATRIX, mv0);
glTranslatef(gluvv.rinfo.trans[0], //translate
gluvv.rinfo.trans[1],
gluvv.rinfo.trans[2]);
glMultMatrixf(gluvv.rinfo.xform); //rotate
glTranslatef(-gluvv.mv->xfSize/2, //center
-gluvv.mv->yfSize/2,
-gluvv.mv->zfSize/2);
GLdouble mv[16];
glGetDoublev(GL_MODELVIEW_MATRIX, mv); //save modelview matrix
//--------------- end set up transformation ----------------------------
//----------------------------- get clip space values -----------------
GLfloat trans[16] = { 1,0,0,0,
0,1,0,0,
0,0,1,0,
gluvv.rinfo.trans[0], gluvv.rinfo.trans[1], gluvv.rinfo.trans[2],1};
GLfloat shift[16] = { 1,0,0,0,
0,1,0,0,
0,0,1,0,
-gluvv.mv->xfSize/2, -gluvv.mv->yfSize/2, -gluvv.mv->zfSize/2,1};
GLfloat tmp1[16];
matrixMult(tmp1, gluvv.rinfo.xform, shift);
GLfloat volmv[16]; //volume - model view
matrixMult(volmv, trans, tmp1);
GLfloat clipt[16] = { 1,0,0,0,
0,1,0,0,
0,0,1,0,
gluvv.clip.pos[0], gluvv.clip.pos[1], gluvv.clip.pos[2],1};
GLfloat tmp2[16];
matrixMult(tmp2, clipt, gluvv.clip.xform);
GLfloat invcp[16]; // inverse clip
inverseMatrix(invcp, tmp2);
GLfloat vol2cp[16]; //volume space to clip space
matrixMult(vol2cp, invcp, volmv);
for(int i =0; i<8; ++i){
translateV3W(ccoords[i], vol2cp, vcoords[i]);
}
//-------------------------- end get clip space values -----------------
//-------------- Re-Scale Alpha values ---------------------------------
if(gluvv.volren.scaleAlphas){
if((lastSamp != gluvv.volren.sampleRate)||(gluvv.volren.loadTLUT)){ //see if the sample rate changed
if((lastGoodSamp != gluvv.volren.goodSamp) || gluvv.volren.loadTLUT){
copyScale(gluvv.volren.goodSamp * 1/gluvv.volren.gamma, gDeptex);
lastGoodSamp = gluvv.volren.goodSamp;
}
if((lastInteSamp != gluvv.volren.interactSamp) || gluvv.volren.loadTLUT){
copyScale(gluvv.volren.interactSamp * 1/gluvv.volren.gamma, iDeptex);
lastInteSamp = gluvv.volren.interactSamp;
}
if(gluvv.volren.sampleRate == gluvv.volren.goodSamp){
loadDepTex(gDeptex);
lastSamp = gluvv.volren.goodSamp;
}
else if(gluvv.volren.sampleRate == gluvv.volren.interactSamp){
loadDepTex(iDeptex);
lastSamp = gluvv.volren.interactSamp;
}
gluvv.volren.loadTLUT = 0;
}
} else { //just do gamma scale
if(gluvv.volren.loadTLUT){
copyScale(1/gluvv.volren.gamma, gDeptex);
loadDepTex(gDeptex);
gluvv.volren.loadTLUT = 0;
}
}
//-------------- end Re-Scale Alpha values ---------------------------------
//-------------- clipping plane setup -----------
if(gluvv.clip.on && (!gluvv.clip.ortho)){
glPushMatrix();{
glLoadIdentity();
glMultMatrixd(mv0);
glTranslatef(gluvv.clip.pos[0], //location of clipping plane
gluvv.clip.pos[1],
gluvv.clip.pos[2]);
glMultMatrixf(gluvv.clip.xform); //rotation of clip plane
GLdouble zup[4] = {0, 0, -1, 0}; // always in z direction
glEnable(GL_CLIP_PLANE5); //enable the gl clip plane
glClipPlane(GL_CLIP_PLANE5, zup);
} glPopMatrix();
}
texts[0][0] = texts[1][0] = texts[2][0] = 0.02;
texts[0][1] = texts[1][1] = texts[2][1] = .98;
vexts[0][0] = vexts[1][0] = vexts[2][0] = 0;
vexts[0][1] = gluvv.mv->xfSize;
vexts[1][1] = gluvv.mv->yfSize;
vexts[2][1] = gluvv.mv->zfSize;
if(gluvv.clip.on && gluvv.clip.ortho){
float cp[3];
cp[0] = gluvv.clip.vpos[0] > 0 ?
(gluvv.clip.vpos[0] < gluvv.mv->xfSize ? gluvv.clip.vpos[0] : gluvv.mv->xfSize) : 0;
cp[1] = gluvv.clip.vpos[1] > 0 ?
(gluvv.clip.vpos[1] < gluvv.mv->yfSize ? gluvv.clip.vpos[1] : gluvv.mv->yfSize) : 0;
cp[2] = gluvv.clip.vpos[2] > 0 ?
(gluvv.clip.vpos[2] < gluvv.mv->zfSize ? gluvv.clip.vpos[2] : gluvv.mv->zfSize) : 0;
switch(gluvv.clip.oaxis){
case VolRenAxisXPos:
texts[0][1] = cp[0]/gluvv.mv->xfSize;
vexts[0][1] = cp[0];
break;
case VolRenAxisXNeg:
texts[0][0] = cp[0]/gluvv.mv->xfSize;
vexts[0][0] = cp[0];
break;
case VolRenAxisYPos:
texts[1][1] = cp[1]/gluvv.mv->yfSize;
vexts[1][1] = cp[1];
break;
case VolRenAxisYNeg:
texts[1][0] = cp[1]/gluvv.mv->yfSize;
vexts[1][0] = cp[1];
break;
case VolRenAxisZPos:
texts[2][1] = cp[2]/gluvv.mv->zfSize;
vexts[2][1] = cp[2];
break;
case VolRenAxisZNeg:
texts[2][0] = cp[2]/gluvv.mv->zfSize;
vexts[2][0] = cp[2];
break;
}
}
//-------------- end clipping plane setup -------
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//-------------- draw Clip plane slice ----------
float vdir[3];
subV3(vdir, gluvv.env.eye, gluvv.clip.pos);
normalizeV3(vdir);
normalizeV3(gluvv.clip.dir);
float dv = dotV3(vdir,gluvv.clip.dir);
drawClip(dv);
//-------------- end draw Clip plane slice -----
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//-------------- Texture Shader setup --------------------------------------
glEnable(GL_TEXTURE_SHADER_NV); {
GlErr("nv20volren", "enable shader");
glActiveTexture(GL_TEXTURE0_ARB); { //this is for the slice
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_TEXTURE_2D);
}
glActiveTexture(GL_TEXTURE1_ARB); { //this is for the transfer function
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_DEPENDENT_GB_TEXTURE_2D_NV);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_2D, deptexName);
}
glActiveTexture(GL_TEXTURE2_ARB); { // for shading or clipping (not both)
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
else if(gluvv.clip.on && (!gluvv.clip.ortho))
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_CULL_FRAGMENT_NV);
}
glActiveTexture(GL_TEXTURE3_ARB); { //not used
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
}
//-------------- Texture Shader setup --------------------------------------
//-------------- Register Combiner Setup -----------------------------------
setupShading();
//-------------- end Register Combiner Setup -------------------------------
//-------------- Render the Volume -----------------------------------------
VolRenMajorAxis ma = getMajorAxis(mv);
glColor4f(1,1,1,gluvv.tf.slider1hi);
switch(ma){
case VolRenAxisXPos:
renXPos();
break;
case VolRenAxisYPos:
renYPos();
break;
case VolRenAxisZPos:
renZPos();
break;
case VolRenAxisXNeg:
renXNeg();
break;
case VolRenAxisYNeg:
renYNeg();
break;
case VolRenAxisZNeg:
renZNeg();
break;
} //end switch major axis
//-------------- end Render the Volume --------------------------------------
} glDisable(GL_TEXTURE_SHADER_NV);
//if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
glDisable(GL_REGISTER_COMBINERS_NV);
//}
//---------------- Reset the texture units ------------------------------------
glActiveTexture(GL_TEXTURE3_ARB); { //not used
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
}
glActiveTexture(GL_TEXTURE2_ARB); { //not used
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
}
glActiveTexture(GL_TEXTURE1_ARB); { //not used
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
}
glActiveTexture(GL_TEXTURE0_ARB); { //not used
glDisable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_SHADER_NV, GL_SHADER_OPERATION_NV, GL_NONE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_NONE);
}
//---------------- end Reset the texture units --------------------------------
//-------------- draw Clip plane slice ----------
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
drawClip(-dv);
glDisable(GL_BLEND);
//-------------- end draw Clip plane slice ------
} glPopMatrix();
glDisable(GL_CLIP_PLANE5);
}
//=================================================== Render along axies
//======================================================================
void NV20VolRen::renXPos()
{
float dist = vexts[0][1] - vexts[0][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->xfSize;
int samps = tsamps * (texts[0][1] - texts[0][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sx * (dist/gluvv.mv->xfSize);
int istart = texts[0][0] * sx;
float w[4];
for(int i=samps-2; i>=1; --i){
float ds = 1.0 - ((istart +i*idxi) - (int)(istart + i*idxi));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[2],sy,sz,
texNames2D[sz+sy+(int)(istart + i*idxi)],
texNames2D[sz+sy+MIN((int)(istart + i*idxi)+1, sx-1)], w);
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[2]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+sy+(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+sy+MIN((int)(istart + i*idxi)+1, sx-1)]);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][0],texts[2][0]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][0], vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][1],texts[2][0]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][1], vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][1],texts[2][1]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][1], vexts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][0],texts[2][1]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][0], vexts[2][1]);
} glEnd();
}
}
void NV20VolRen::renXNeg()
{
float dist = vexts[0][1] - vexts[0][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->xfSize;
int samps = tsamps * (texts[0][1] - texts[0][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sx * (dist/gluvv.mv->xfSize);
int istart = texts[0][0] * sx;
float w[4];
for(int i=1; i<samps-1; ++i){
float ds = 1.0 - ((istart +i*idxi) - (int)(istart + i*idxi));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[2],sy,sz,
texNames2D[sz+sy+(int)(istart + i*idxi)],
texNames2D[sz+sy+MIN((int)(istart + i*idxi)+1, sx-1)], w);
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[2]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+sy+(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+sy+MIN((int)(istart + i*idxi)+1, sx-1)]);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][0],texts[2][0]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][0], vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][1],texts[2][0]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][1], vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][1],texts[2][1]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][1], vexts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[1][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[1][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[1][0],texts[2][1]);
glVertex3f(vexts[0][0] + i*inc, vexts[1][0], vexts[2][1]);
} glEnd();
}
}
void NV20VolRen::renYPos()
{
float dist = vexts[1][1] - vexts[1][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->yfSize;
int samps = tsamps * (texts[1][1] - texts[1][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sy * (dist/gluvv.mv->yfSize);
int istart = texts[1][0] * sy;
float w[4];
for(int i=samps-2; i>=1; --i){
float ds = 1.0 - ((istart + i*idxi) - (int)(istart + i*idxi));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[1],sx,sz,
texNames2D[sz+(int)(istart + i*idxi)],
texNames2D[sz+MIN((int)(istart + i*idxi)+1, sy-1)], w);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[1]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+MIN((int)(istart + i*idxi)+1, sy-1)]);
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[2][0]);
glVertex3f(vexts[0][0],vexts[1][0]+i*inc, vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[2][0]);
glVertex3f(vexts[0][1],vexts[1][0]+i*inc, vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[2][1]);
glVertex3f(vexts[0][1],vexts[1][0]+i*inc, vexts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[2][1]);
glVertex3f(vexts[0][0],vexts[1][0]+i*inc, vexts[2][1]);
} glEnd();
}
}
void NV20VolRen::renYNeg()
{
float dist = vexts[1][1] - vexts[1][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->yfSize;
int samps = tsamps * (texts[1][1] - texts[1][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sy * (dist/gluvv.mv->yfSize);
int istart = texts[1][0] * sy;
float w[4];
for(int i=1; i<samps-2; ++i){
float ds = 1.0 - ((istart + i*idxi) - (int)(istart + i*idxi));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[1],sx,sz,
texNames2D[sz+(int)(istart + i*idxi)],
texNames2D[sz+MIN((int)(istart + i*idxi)+1, sy-1)], w);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[1]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[sz+MIN((int)(istart + i*idxi)+1, sy-1)]);
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[2][0]);
glVertex3f(vexts[0][0],vexts[1][0]+i*inc, vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[2][0]);
glVertex3f(vexts[0][1],vexts[1][0]+i*inc, vexts[2][0]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[2][1]);
glVertex3f(vexts[0][1],vexts[1][0]+i*inc, vexts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[2][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[2][1]);
glVertex3f(vexts[0][0],vexts[1][0]+i*inc, vexts[2][1]);
} glEnd();
}
}
void NV20VolRen::renZNeg()
{
float dist = vexts[2][1] - vexts[2][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->zfSize;
int samps = tsamps * (texts[2][1] - texts[2][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sz * (dist/gluvv.mv->zfSize);
int istart = texts[2][0] * sz;
float w[4];
for(int i=samps-1; i>=0; --i){
float ds = 1.0 - ((istart + i*idxi) - (floor((istart + i*idxi))));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[0],sx,sy,
texNames2D[(int)(istart + i*idxi)],
texNames2D[MIN((int)(istart + i*idxi)+1, sz-1)], w);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[0]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[MIN((int)(istart + i*idxi)+1, sz-1)]);
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[1][0]);
glVertex3f(vexts[0][0],vexts[1][0],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[1][0]);
glVertex3f(vexts[0][1],vexts[1][0],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[1][1]);
glVertex3f(vexts[0][1],vexts[1][1],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[1][1]);
glVertex3f(vexts[0][0],vexts[1][1],vexts[2][0] + i*inc);
} glEnd();
}
}
void NV20VolRen::renZPos()
{
float dist = vexts[2][1] - vexts[2][0];
int tsamps = gluvv.volren.sampleRate * 100 * gluvv.mv->zfSize;
int samps = tsamps * (texts[2][1] - texts[2][0]);
//float inc = gluvv.mv->zfSize/(float)samps;
float inc = dist/(float)samps;
float idxi = (1.0/(float)samps) * sz * (dist/gluvv.mv->zfSize);
int istart = texts[2][0] * sz;
float w[4];
for(int i=1; i<samps-1; ++i){
float ds = 1.0 - ((istart + i*idxi) - (floor((istart + i*idxi))));
w[0] = ds; w[1] = ds; w[2] = ds; w[3] = ds;
interpSlice(temptexNames[0],sx,sy,
texNames2D[(int)(istart + i*idxi)],
texNames2D[MIN((int)(istart + i*idxi)+1, sz-1)], w);
w[3] = .3;
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, w); //set w
glActiveTexture(GL_TEXTURE0_ARB); glBindTexture(GL_TEXTURE_2D, temptexNames[0]);
glActiveTexture(GL_TEXTURE2_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[(int)(istart + i*idxi)]);
glActiveTexture(GL_TEXTURE3_ARB); glBindTexture(GL_TEXTURE_2D, shadeNames[MIN((int)(istart + i*idxi)+1, sz-1)]);
glBegin(GL_QUADS);{
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[1][0]);
glVertex3f(vexts[0][0],vexts[1][0],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[1][0]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[1][0]);
glVertex3f(vexts[0][1],vexts[1][0],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][1],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][1],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][1],texts[1][1]);
glVertex3f(vexts[0][1],vexts[1][1],vexts[2][0] + i*inc);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB,texts[0][0],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE2_ARB,texts[0][0],texts[1][1]);
glMultiTexCoord2fARB(GL_TEXTURE3_ARB,texts[0][0],texts[1][1]);
glVertex3f(vexts[0][0],vexts[1][1],vexts[2][0] + i*inc);
} glEnd();
}
}
//======================================================== setup shading
//======================================================================
void NV20VolRen::setupShading()
{
if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
float vdir[3];
subV3(vdir, gluvv.env.eye, gluvv.env.at);
normalizeV3(vdir);
float ltdir[3];
subV3(ltdir, gluvv.light.pos, gluvv.env.at);
normalizeV3(ltdir);
float ltoe[3];
subV3(ltoe,vdir,ltdir);
scaleV3(.5, ltoe);
float half[4];
addV3(half,ltdir, ltoe);
half[3] = 1;
float vhalf[4];
float invx[16];
inverseMatrix(invx, gluvv.rinfo.xform);
translateV3(vhalf,invx,half);
negateV3(vhalf);
normalizeV3(vhalf);
vhalf[0] = vhalf[0]/2 + .5;
vhalf[1] = vhalf[1]/2 + .5;
vhalf[2] = vhalf[2]/2 + .5;
glFogfv(GL_FOG_COLOR, vhalf);
float lpos[4];
translateV3W(lpos, invx, ltdir);
negateV3(lpos);
normalizeV3(ltdir);
lpos[0] = lpos[0]/2 + .5;
lpos[1] = lpos[1]/2 + .5;
lpos[2] = lpos[2]/2 + .5;
lpos[3] = gluvv.tf.slider1lo;
glCombinerParameterfvNV(GL_CONSTANT_COLOR1_NV, lpos); //set light direction
glEnable(GL_REGISTER_COMBINERS_NV);
glCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 8);
//---------------- set up alpha part ------------------
if(gluvv.mv1){
#if 1
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_SPARE0_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom0.4a");
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER1_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_SPARE1_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom1.4a");
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER2_NV, GL_ALPHA,
GL_SPARE0_NV, GL_SPARE1_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom2.4a");
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER3_NV, GL_ALPHA,
GL_SPARE1_NV, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom3.4a");
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER4_NV, GL_ALPHA,
GL_TEXTURE1_ARB, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom4.4a");
#endif
}
//------------------------- set up RGB part -------------------------------------------------
//compute tex1 * w + tex2 * (1-w), ie interp shade textures
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV, GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_C_NV, GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_D_NV, GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_INVERT_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER0_NV, GL_RGB,
GL_DISCARD_NV, GL_DISCARD_NV, GL_PRIMARY_COLOR_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom0.4");
//do dot products for 2-sided lighting
glCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_A_NV, GL_PRIMARY_COLOR_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_B_NV, GL_CONSTANT_COLOR1_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_C_NV, GL_PRIMARY_COLOR_NV, GL_EXPAND_NEGATE_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_D_NV, GL_CONSTANT_COLOR1_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER1_NV, GL_RGB,
GL_SPARE1_NV, GL_SPARE0_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_TRUE, GL_TRUE, GL_FALSE);
GlErr("nv20volren","gcom1.4");
//compute diffuse illumination times color
glCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_A_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_B_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_C_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_D_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER2_NV, GL_RGB,
GL_DISCARD_NV, GL_DISCARD_NV, GL_SPARE1_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom2.4");
//compute specular illumination & ambiant contribution
glCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_A_NV, GL_PRIMARY_COLOR_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_B_NV, GL_FOG, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_C_NV, GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_RGB, GL_VARIABLE_D_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER3_NV, GL_RGB,
GL_TEXTURE2_ARB, GL_TEXTURE3_ARB, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom3.4");
//diffuse + ambiant
glCombinerInputNV(GL_COMBINER4_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER4_NV, GL_RGB, GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER4_NV, GL_RGB, GL_VARIABLE_C_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER4_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER4_NV, GL_RGB,
GL_DISCARD_NV, GL_DISCARD_NV, GL_TEXTURE3_ARB, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom4.4");
glCombinerInputNV(GL_COMBINER5_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER5_NV, GL_RGB, GL_VARIABLE_B_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER5_NV, GL_RGB, GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER5_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER5_NV, GL_RGB,
GL_TEXTURE2_ARB, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom5.4");
glCombinerInputNV(GL_COMBINER6_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER6_NV, GL_RGB, GL_VARIABLE_B_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER6_NV, GL_RGB, GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER6_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER6_NV, GL_RGB,
GL_TEXTURE2_ARB, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom6.4");
glCombinerInputNV(GL_COMBINER7_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER7_NV, GL_RGB, GL_VARIABLE_B_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER7_NV, GL_RGB, GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER7_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerOutputNV(GL_COMBINER7_NV, GL_RGB,
GL_TEXTURE2_ARB, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom7.4");
glFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_E_TIMES_F_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_E_TIMES_F_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_TEXTURE3_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_E_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_F_NV, GL_TEXTURE2_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
GlErr("nv20volren","fcom.0");
}
else { //no shading!
#if 1
if(gluvv.mv1){
glEnable(GL_REGISTER_COMBINERS_NV);
float emph[4];
emph[3] = gluvv.tf.slider1lo;
glCombinerParameterfvNV(GL_CONSTANT_COLOR1_NV, emph);
glCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 5);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER0_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER0_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_SPARE0_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom0.4a");
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER1_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER1_NV, GL_ALPHA,
GL_DISCARD_NV, GL_DISCARD_NV, GL_SPARE1_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom1.4a");
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER2_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER2_NV, GL_ALPHA,
GL_SPARE0_NV, GL_SPARE1_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom2.4a");
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER3_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER3_NV, GL_ALPHA,
GL_SPARE0_NV, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom3.4a");
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_A_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_B_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerInputNV(GL_COMBINER4_NV, GL_ALPHA, GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER4_NV, GL_ALPHA,
GL_TEXTURE1_ARB, GL_DISCARD_NV, GL_DISCARD_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
GlErr("nv20volren","gcom4.4a");
glFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_E_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_F_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_TEXTURE1_ARB, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
GlErr("nv20volren","fcom.0");
}
#endif
}
}
//============================================================ draw Clip
//======================================================================
void NV20VolRen::drawClip(float dv)
{
if((!gluvv.clip.on)||(!gluvv.clip.ortho)) return;
float *c[4];
c[0] = gluvv.clip.corners[0];
c[1] = gluvv.clip.corners[1];
c[2] = gluvv.clip.corners[2];
c[3] = gluvv.clip.corners[3];
c[0][0] = CLAMP_ARB(0,c[0][0],gluvv.mv->xfSize);
c[1][0] = CLAMP_ARB(0,c[1][0],gluvv.mv->xfSize);
c[2][0] = CLAMP_ARB(0,c[2][0],gluvv.mv->xfSize);
c[3][0] = CLAMP_ARB(0,c[3][0],gluvv.mv->xfSize);
c[0][1] = CLAMP_ARB(0,c[0][1],gluvv.mv->yfSize);
c[1][1] = CLAMP_ARB(0,c[1][1],gluvv.mv->yfSize);
c[2][1] = CLAMP_ARB(0,c[2][1],gluvv.mv->yfSize);
c[3][1] = CLAMP_ARB(0,c[3][1],gluvv.mv->yfSize);
c[0][2] = CLAMP_ARB(0,c[0][2],gluvv.mv->zfSize);
c[1][2] = CLAMP_ARB(0,c[1][2],gluvv.mv->zfSize);
c[2][2] = CLAMP_ARB(0,c[2][2],gluvv.mv->zfSize);
c[3][2] = CLAMP_ARB(0,c[3][2],gluvv.mv->zfSize);
glEnable(GL_REGISTER_COMBINERS_NV);
glCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 1);
// I am just using these to replace the texture's alpha with a different one
float alpha[4] = {1,1,1,gluvv.clip.alpha};
glCombinerParameterfvNV(GL_CONSTANT_COLOR0_NV, alpha); //set W
glFinalCombinerInputNV(GL_VARIABLE_A_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
GlErr("nv20volren","fcom1");
glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
GlErr("nv20volren","fcom2");
glFinalCombinerInputNV(GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
GlErr("nv20volren","fcom3");
glFinalCombinerInputNV(GL_VARIABLE_D_NV, GL_TEXTURE0_ARB, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
GlErr("nv20volren","fcom0");
glFinalCombinerInputNV(GL_VARIABLE_G_NV, GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
switch(gluvv.clip.oaxis){
case VolRenAxisXPos:
if((dv < 0)&&(c[0][0] > 0)&&(c[0][0]<gluvv.mv->xfSize)){
float xw[4];
xw[0] = xw[1] = xw[2] = xw[3] =
1-(gluvv.clip.vpos[0]/gluvv.mv->xfSize*sx -
(int)(gluvv.clip.vpos[0]/gluvv.mv->xfSize*sx));
interpSlice(temptexNames[2],sy,sz,
texNames2D[sz+sy+(int)(gluvv.clip.vpos[0]/gluvv.mv->xfSize*sx)],
texNames2D[sz+sy+MIN((int)(gluvv.clip.vpos[0]/gluvv.mv->xfSize*sx)+1, sx-1)],
xw);