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R8kVolRen3D_sav.cpp
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R8kVolRen3D_sav.cpp
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// ________ ____ ___
// | \ / | / /
// +---+ \/ |/ /
// +--+| |\ /| <
// | || | \ / | |\ \
// | | \/ | | \ \
// \_____| |__| \__\
// Copyright 2001
// Joe Michael Kniss
// << [email protected] >>
// "All Your Base are Belong to Us"
//-------------------------------------------------------------------------
// R8kVolRen3D_sav.cpp: implementation of the R8kVolRen3D_sav class.
//
//////////////////////////////////////////////////////////////////////
#ifdef WIN32
#include <windows.h>
#endif
#include "R8kVolRen3D_sav.h"
#include <iostream.h>
#include <stdlib.h>
#include "VectorMath.h"
#include "glUE.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
R8kVolRen3D_sav::R8kVolRen3D_sav()
{
go = 0;
fsNames = 0;
pbfsNames = 0;
currentTStep = gluvv.volren.timestep;
}
R8kVolRen3D_sav::~R8kVolRen3D_sav()
{
}
//================================================================= INIT
//======================================================================
void R8kVolRen3D_sav::init()
{
srand(328973892);
cerr << "initing" << endl;
if(gluvv.mv){
go = 1;
createVolumes(1);
create2DDepTex();
createShadowTex();
createFragShades(fsNames);
createCubeTex();
if(!(pbuff = new PBuffer(gluvv.light.buffsz[0], gluvv.light.buffsz[1],
GLUT_SINGLE | GLUT_RGBA))){
cerr << "ERROR: PBuffer intialization failed!" << endl;
} else {
pbuff->Initialize(true); //create a shared pbuffer
pbuff->MakeCurrent(); {
glClearColor( 0.0, 0.0, 0.0, 0.0 );
glMatrixMode( GL_PROJECTION );
glOrtho(0,gluvv.light.buffsz[0],0,gluvv.light.buffsz[1],1,3);
glMatrixMode(GL_MODELVIEW);
gluLookAt(0,0,2,
0,0,0,
0,1,0);
createFragShades(pbfsNames);
} MakeCurrent();
cerr << "PBuffer intialization succeded" << endl;
}
}
cerr << "Using the Shadow Renderer!!!!!!!" << endl;
}
//================================================================= DRAW
//======================================================================
void R8kVolRen3D_sav::draw()
{
if(!go) return;
renderVolume();
//renderSlice();
}
//======================================================== Render Volume
//======================================================================
//========== 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)
//
void R8kVolRen3D_sav::renderVolume()
{
if(gluvv.reblend) return;
if(gluvv.picking){
return;
}
if(gluvv.volren.timestep != currentTStep){
cerr << "Loading new volume : " << gluvv.volren.timestep << endl;
currentTStep = gluvv.volren.timestep;
createVolumes();
}
//-------------- load new shading cube map -----------------------------
if(gluvv.light.load||gluvv.light.gload){
loadCubeTex(gluvv.light.gload);
gluvv.light.load = 0;
gluvv.light.gload = 0;
}
//-------------- end load new shading cube map -------------------------
//-------------- 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){ //good sample rate changed
copyScale(gDeptex, gluvv.volren.goodSamp * 1/gluvv.volren.gamma, deptex);
lastGoodSamp = gluvv.volren.goodSamp;
}
if((lastInteSamp != gluvv.volren.interactSamp) || gluvv.volren.loadTLUT){ //interact samp rate changed
copyScale(iDeptex, gluvv.volren.interactSamp * 1/gluvv.volren.gamma, deptex);
lastInteSamp = gluvv.volren.interactSamp;
}
if(gluvv.volren.sampleRate == gluvv.volren.goodSamp){ //which one do we load (good)
loadDepTex(gDeptex);
lastSamp = gluvv.volren.goodSamp;
}
else if(gluvv.volren.sampleRate == gluvv.volren.interactSamp){ //(interactive)
loadDepTex(iDeptex);
lastSamp = gluvv.volren.interactSamp;
}
if(gluvv.volren.loadTLUT){ //now load the transfer function
loadDepTex(gluvv.volren.deptex2, deptex2Name);
}
gluvv.volren.loadTLUT = 0;
}
} else { //just do gamma scale, don't update for the sample rate (for testing purposes)
if(gluvv.volren.loadTLUT){
copyScale(gDeptex, 1/gluvv.volren.gamma, deptex);
loadDepTex(gDeptex);
loadDepTex(gluvv.volren.deptex2, deptex2Name);
gluvv.volren.loadTLUT = 0;
}
}
//-------------- end Re-Scale Alpha values ------------------------------
//-------------- do dot product with clip and view dir
float vdir[3];
subV3(vdir, gluvv.env.eye, gluvv.clip.pos);
normalizeV3(vdir);
normalizeV3(gluvv.clip.dir);
float dv = dotV3(vdir,gluvv.clip.dir);
float globalModV[16]; //save original tranform
glGetFloatv(GL_MODELVIEW_MATRIX, globalModV); //save the world model view
//-------------- end do dot product with clip and view dir
glPushMatrix();{ //move to the volume location
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);
//-- first compute the axis for rendering
float axis[4] = {0,0,1,-1}; //axis[0-2] for view direction and [3] for the dot
// modify slice axis for shadowing -------------------------------------
if(gluvv.light.shadow){
float ldir[3]; //figure out the light direction
copyV3(ldir,gluvv.light.pos); //this is the position
negateV3(ldir); //this is the direction
normalizeV3(ldir); //normalize both vectors
normalizeV3(axis); // light & axis
float vdl = dotV3(ldir,axis); //the dot product tells us to flip the axis
if(vdl<=0){ //need to negate the axis
//cerr << "back to front" << endl;
negateV3(axis);
} else {
//cerr << "front to back" << endl;
}
//now compute (v - l)/2 + l = halfway view and light
float spn[3]; //slice plane normal
subV3(spn, axis, ldir);
scaleV3(.5,spn);
float halfv[3];
addV3(halfv, spn, ldir);
copyV3(axis, halfv);
axis[3] = vdl; //this stores the value of the dot product
//its a left handed coordiante system duh
axis[1] = -axis[1];//why? I have no idea, there must be something wrong with my math
negateV3(axis); //the actual direction for slicing
}
// end modify slice axis for shadowing --------------------------------
GLdouble mv[16];
glGetDoublev(GL_MODELVIEW_MATRIX, mv); //save modelview matrix
// --------------------- set up shading transform ---------------------
float *r = gluvv.rinfo.xform;
float cons0[4] = {r[0]/2+.5, r[4]/2+.5, r[8]/2+.5, gluvv.clip.alpha};
float cons1[4] = {r[1]/2+.5, r[5]/2+.5, r[9]/2+.5, 0};
float cons2[4] = {r[2]/2+.5, r[6]/2+.5, r[10]/2+.5, 0};
glSetFragmentShaderConstantATI(GL_CON_0_ATI, cons0);
glSetFragmentShaderConstantATI(GL_CON_1_ATI, cons1);
glSetFragmentShaderConstantATI(GL_CON_2_ATI, cons2);
// --------------------- end set up shading transform -----------------
// --------------------- set up attinuation parameters ----------------
GLfloat tmpmv[16];
getModelView(tmpmv);
GLfloat invmv[16];
inverseMatrix(invmv, tmpmv);
translateV3W(volview, invmv, gluvv.env.eye);
translateV3W(vollt, invmv, gluvv.light.pos);
ltrange[0] = normV3(gluvv.light.pos) - gluvv.light.lattLimits[0];
ltrange[1] = normV3(gluvv.light.pos) - gluvv.light.lattLimits[1];
fogrange[0] = normV3(gluvv.env.eye) - gluvv.light.fogLimits[0];
fogrange[1] = normV3(gluvv.env.eye) - gluvv.light.fogLimits[1];
float cons3[4] = {gluvv.light.fogColor[0],
gluvv.light.fogColor[1],
gluvv.light.fogColor[2],
gluvv.light.amb};
glSetFragmentShaderConstantATI(GL_CON_3_ATI, cons3);
// --------------------- end set up attinuation parameters ------------
//-------------- draw clip slices --------------------------------------
if(axis[3] <= 0){ //only do this if front to back
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(GL_FALSE);
for(int i=0; i<gluvv.mv->numSubVols; ++i){
drawClip(i, dv, globalModV);
}
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
}
//-------------- end draw clip slices ----------------------------------
//---------------------- set up shading environment -------------------
setupTexUs();
setupFragShade(axis[3]);
setupPBuff();
glDepthMask(GL_FALSE); //no depth wright, only depth test
//---------------------- end set up shading environment ---------------
#if 1
gluvv.reblend = GB_UNDER; //force gluvv.display to composite the background
#endif
//----------------------------------------------------------------------
//-------------- render the volume -------------------------------------
renderBricks(mv, axis); //RENDER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//-------------- end render the volume ---------------------------------
//----------------------------------------------------------------------
//----------------------- clean up shading environment ----------------
glDepthMask(GL_TRUE);
glDisable(GL_BLEND);
resetPBuff();
resetTexUs();
resetFragShade();
//----------------------- end clean up shading environment -------------
//-------------- draw clip slices --------------------------------------
if(axis[3] <= 0){
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(GL_FALSE);
for(int i=0; i<gluvv.mv->numSubVols; ++i){
drawClip(i, -dv, globalModV);
}
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
} else {
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(GL_FALSE);
for(int i=0; i<gluvv.mv->numSubVols; ++i){
drawClip(i, -dv, globalModV);
}
glDisable(GL_BLEND);
glDepthMask(GL_TRUE);
}
//-------------- end draw clip slices ----------------------------------
} glPopMatrix();
resetFragShade();
resetTexUs();
resetClips();
//------------- render last thing copied from pbuffer --------------------
if(gluvv.light.showView){
pbuff->MakeCurrent();{
glActiveTexture(GL_TEXTURE0_ARB);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, shadowName);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
0, 0,
gluvv.light.buffsz[0], gluvv.light.buffsz[1]);
glBindTexture(GL_TEXTURE_2D, 0);
} MakeCurrent();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, shadowName);
glBegin(GL_QUADS);{
glTexCoord2f(0,0);
glVertex3f(0,0,0);
glTexCoord2f(1,0);
glVertex3f(1,0,0);
glTexCoord2f(1,1);
glVertex3f(1,1,0);
glTexCoord2f(0,1);
glVertex3f(0,1,0);
} glEnd();
glDisable(GL_TEXTURE_2D);
}
//------------- end render last thing copied from pbuffer ----------------
glEnable(GL_LIGHTING);
GlErr("r8kvolren::draw", "end");
}
//======================================================= Get Model View
//======================================================================
void R8kVolRen3D_sav::getModelView(float mv[16])
{
float m1[16];
identityMatrix(m1);
m1[12] = gluvv.rinfo.trans[0];
m1[13] = gluvv.rinfo.trans[1];
m1[14] = gluvv.rinfo.trans[2];
float m2[16];
matrixMult(m2, m1, gluvv.rinfo.xform);
float scale[16];
identityMatrix(scale);
scale[0] = gluvv.rinfo.scale;
scale[5] = gluvv.rinfo.scale;
scale[10]= gluvv.rinfo.scale;
float m3[16];
matrixMult(m3, m2, scale);
float m4[16];
identityMatrix(m4);
m4[12] = -.5 * gluvv.mv->xfSize;
m4[13] = -.5 * gluvv.mv->yfSize;
m4[14] = -.5 * gluvv.mv->zfSize;
matrixMult(mv, m3, m4);
}
//======================================================== Render Bricks
//======================================================================
void R8kVolRen3D_sav::renderBricks(GLdouble mv[16], GLfloat axis[4])
{
if(gluvv.mv->numSubVols > 1){ //render multiple bricked volumes
int *order = new int[gluvv.mv->numSubVols]; //the correct draw order
float *zval = new float[gluvv.mv->numSubVols];//zvalue of each subvolume
float ref[3];
copyV3(ref, axis);
negateV3(ref);
scaleV3(100, ref);
//--------------- compute zvalues ----------------------
for(int i=0; i< gluvv.mv->numSubVols; ++i){
Volume *v = &gluvv.mv->volumes[i];
order[i] = i;
float c[3] = {v->xfPos + v->xfSize/2.0, v->yfPos + v->yfSize/2.0, v->zfPos + v->zfSize/2.0};
float center[3];
translateV3W(center, mv, c);
float sub[3];
subV3(sub, ref, center);
//zval[i] = normV3(sub);//(float)(center[0]*center[0] + center[1]*center[1] + center[2]*center[2]);
zval[i] = (float)(center[0]*center[0] + center[1]*center[1] + center[2]*center[2]);
}
//--------------- end compute zvalues -------------------
//--------------- sort Z values -------------------------
for(i=0; i< gluvv.mv->numSubVols-1; ++i){ //now sort
for(int j=i+1; j<gluvv.mv->numSubVols; ++j){
if(axis[3] <=0){ //back to front
if(zval[order[i]] < zval[order[j]]){//test for swap
int tmp = order[i];
order[i] = order[j];
order[j] = tmp;
}
} else { //front to back
if(zval[order[i]] > zval[order[j]]){//test for swap
int tmp = order[i];
order[i] = order[j];
order[j] = tmp;
}
}
}
}
//--------------- end sort Z values ----------------------
//--------------- render bricks --------------------------
for(i=0 ; i< gluvv.mv->numSubVols; ++i){ //finaly render
cerr << "rendering brick " << order[i] << endl;
Volume *v = &gluvv.mv->volumes[order[i]];
float sxf = v->xfSize;
float syf = v->yfSize;
float szf = v->zfSize;
float hpx = 0;//1.0/(gluvv.mv->xiSize*2.0);
float hpy = 0;//1.0/(gluvv.mv->yiSize*2.0);
float hpz = 0;//1.0/(gluvv.mv->ziSize*2.0);
float vo[8][3] = {{0,0,0},{sxf,0,0},{0,syf,0},{sxf,syf,0},{0,0,szf},{sxf,0,szf},{0,syf,szf},{sxf,syf,szf}};
float tx[8][3] = {{0,0,0},{1,0,0},{0,1,0},{1,1,0},
{0,0,1},{1,0,1},{0,1,1},{1,1,1}};
glPushMatrix(); {
setupClips(order[i],vo,tx);
glTranslatef(v->xfPos, v->yfPos, v->zfPos);
render3DVA(gluvv.volren.sampleRate,mv,order[i],vo,tx,axis);
} glPopMatrix();
//glFinish();
}
//--------------- end render bricks ----------------------
} else { //just render one volume!
float sxf = gluvv.mv->xfSize;
float syf = gluvv.mv->yfSize;
float szf = gluvv.mv->zfSize;
float vo[8][3] = {{0,0,0},{sxf,0,0},{0,syf,0},{sxf,syf,0},{0,0,szf},{sxf,0,szf},{0,syf,szf},{sxf,syf,szf}};
float tx[8][3] = {{0,0,0},{1 ,0,0},{0,1 ,0},{1 ,1 ,0},{0,0,1 },{1 ,0,1 },{0,1 ,1 },{1 ,1 ,1 }};
setupClips(0,vo,tx);
render3DVA(gluvv.volren.sampleRate,mv,0,vo,tx,axis);
}
}
//========================================================== Setup Clips
//======================================================================
void R8kVolRen3D_sav::setupClips(int vol, float vo[8][3], float tx[8][3])
{
Volume *v = &gluvv.mv->volumes[vol];
if(gluvv.clip.on && gluvv.clip.ortho){
float cp[3];
cp[0] = gluvv.clip.vpos[0] > v->xfPos ?
(gluvv.clip.vpos[0] < v->xfSize + v->xfPos ? gluvv.clip.vpos[0] - v->xfPos : v->xfSize) : 0;
cp[1] = gluvv.clip.vpos[1] > v->yfPos ?
(gluvv.clip.vpos[1] < v->yfSize + v->yfPos ? gluvv.clip.vpos[1] - v->yfPos : v->yfSize) : 0;
cp[2] = gluvv.clip.vpos[2] > v->zfPos ?
(gluvv.clip.vpos[2] < v->zfSize + v->zfPos ? gluvv.clip.vpos[2] - v->zfPos : v->zfSize) : 0;
switch(gluvv.clip.oaxis){
case VolRenAxisXPos:
tx[1][0] = cp[0]/v->xfSize;
tx[3][0] = cp[0]/v->xfSize;
tx[5][0] = cp[0]/v->xfSize;
tx[7][0] = cp[0]/v->xfSize;
vo[1][0] = cp[0];
vo[3][0] = cp[0];
vo[5][0] = cp[0];
vo[7][0] = cp[0];
break;
case VolRenAxisXNeg:
tx[0][0] = cp[0]/v->xfSize;
tx[2][0] = cp[0]/v->xfSize;
tx[4][0] = cp[0]/v->xfSize;
tx[6][0] = cp[0]/v->xfSize;
vo[0][0] = cp[0];
vo[2][0] = cp[0];
vo[4][0] = cp[0];
vo[6][0] = cp[0];
break;
case VolRenAxisYPos:
tx[2][1] = cp[1]/v->yfSize;
tx[3][1] = cp[1]/v->yfSize;
tx[6][1] = cp[1]/v->yfSize;
tx[7][1] = cp[1]/v->yfSize;
vo[2][1] = cp[1];
vo[3][1] = cp[1];
vo[6][1] = cp[1];
vo[7][1] = cp[1];
break;
case VolRenAxisYNeg:
tx[0][1] = cp[1]/v->yfSize;
tx[1][1] = cp[1]/v->yfSize;
tx[4][1] = cp[1]/v->yfSize;
tx[5][1] = cp[1]/v->yfSize;
vo[0][1] = cp[1];
vo[1][1] = cp[1];
vo[4][1] = cp[1];
vo[5][1] = cp[1];
break;
case VolRenAxisZPos:
tx[4][2] = cp[2]/v->zfSize;
tx[5][2] = cp[2]/v->zfSize;
tx[6][2] = cp[2]/v->zfSize;
tx[7][2] = cp[2]/v->zfSize;
vo[4][2] = cp[2];
vo[5][2] = cp[2];
vo[6][2] = cp[2];
vo[7][2] = cp[2];
break;
case VolRenAxisZNeg:
tx[0][2] = cp[2]/v->zfSize;
tx[1][2] = cp[2]/v->zfSize;
tx[2][2] = cp[2]/v->zfSize;
tx[3][2] = cp[2]/v->zfSize;
vo[0][2] = cp[2];
vo[1][2] = cp[2];
vo[2][2] = cp[2];
vo[3][2] = cp[2];
break;
}
}
}
//============================================================ drawClips
//======================================================================
void R8kVolRen3D_sav::drawClip(int vol, float dv, float wmv[16])
{
#if 1
if((!gluvv.clip.ortho)){
switch(gluvv.dmode){
case GDM_V1:
case GDM_V1G:
case GDM_V2:
case GDM_VGH_VG:
case GDM_VGH_V:
cerr << "clipping" << endl;
glActiveTexture(GL_TEXTURE2_ARB); { //3rd & 4th axis, or clipping
glEnable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
glPushMatrix();{ //this sets the clipping plane
glLoadIdentity(); //clips are set in world space
glMultMatrixf(wmv); //origional world space coords
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();
break;
}
}
if((!gluvv.clip.on)||(!gluvv.clip.ortho)) return;
Volume *v = &gluvv.mv->volumes[vol];
float c[4][3];
copyV3(c[0],gluvv.clip.corners[0]);
copyV3(c[1],gluvv.clip.corners[1]);
copyV3(c[2],gluvv.clip.corners[2]);
copyV3(c[3],gluvv.clip.corners[3]);
//this moves the clip plane to sub-volume space
c[0][0] = CLAMP_ARB(0,c[0][0]-v->xfPos,v->xfSize);
c[1][0] = CLAMP_ARB(0,c[1][0]-v->xfPos,v->xfSize);
c[2][0] = CLAMP_ARB(0,c[2][0]-v->xfPos,v->xfSize);
c[3][0] = CLAMP_ARB(0,c[3][0]-v->xfPos,v->xfSize);
c[0][1] = CLAMP_ARB(0,c[0][1]-v->yfPos,v->yfSize);
c[1][1] = CLAMP_ARB(0,c[1][1]-v->yfPos,v->yfSize);
c[2][1] = CLAMP_ARB(0,c[2][1]-v->yfPos,v->yfSize);
c[3][1] = CLAMP_ARB(0,c[3][1]-v->yfPos,v->yfSize);
c[0][2] = CLAMP_ARB(0,c[0][2]-v->zfPos,v->zfSize);
c[1][2] = CLAMP_ARB(0,c[1][2]-v->zfPos,v->zfSize);
c[2][2] = CLAMP_ARB(0,c[2][2]-v->zfPos,v->zfSize);
c[3][2] = CLAMP_ARB(0,c[3][2]-v->zfPos,v->zfSize);
glEnable(GL_FRAGMENT_SHADER_ATI);
glBindFragmentShaderATI(cpfsName);
float offset = .001; //this is used to avoid z-compete when the slice is on top
glPushMatrix();{
//make sure we draw this in sub-volume space
glTranslatef(v->xfPos, v->yfPos, v->zfPos);
switch(gluvv.clip.oaxis){
case VolRenAxisXPos:
if((dv < 0)&&(c[0][0] > 0)&&(c[0][0]<v->xfSize)){
float ov[3] = {offset, 0, 0}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
case VolRenAxisXNeg:
if(dv > 0){
float ov[3] = {-offset, 0, 0}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
case VolRenAxisYPos:
if((dv > 0)&&(c[0][1] > 0)&&(c[0][1]<v->yfSize)){
float ov[3] = {0, offset, 0}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
case VolRenAxisYNeg:
if((dv < 0)&&(c[0][1] > 0)&&(c[0][1]<v->yfSize)){
float ov[3] = {0, -offset, 0}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
case VolRenAxisZPos:
if((dv < 0)&&(c[0][2] > 0)&&(c[0][2]<v->zfSize)){
float ov[3] = {0, 0, offset}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
case VolRenAxisZNeg:
if((dv > 0)&&(c[0][2] > 0)&&(c[0][2]<v->zfSize)){
float ov[3] = {0, 0, -offset}; //offset vector
for(int i=0; i<4; ++ i)
addV3(c[i],c[i],ov);
renderSlice(c,vol);
}
break;
}
} glPopMatrix();
#if 0
glActiveTexture(GL_TEXTURE0_ARB); {
glDisable(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);
}
#endif
#endif
}
//============================================== Render Slice w/ corners
//======================================================================
void R8kVolRen3D_sav::renderSlice(float c[4][3], int vol)
{
glActiveTexture(GL_TEXTURE0_ARB); { //this is for the slice
glEnable(GL_TEXTURE_3D);
glBindTexture(GL_TEXTURE_3D, texNames[vol]);
}
Volume *v = &gluvv.mv->volumes[vol];
glBegin(GL_QUADS);{
glMultiTexCoord3fARB(GL_TEXTURE0_ARB,c[0][0]/(v->xfSize),c[0][1]/(v->yfSize),c[0][2]/(v->zfSize));
glVertex3f(c[0][0], c[0][1], c[0][2]);
glMultiTexCoord3fARB(GL_TEXTURE0_ARB,c[1][0]/(v->xfSize),c[1][1]/(v->yfSize),c[1][2]/(v->zfSize));
glVertex3f(c[1][0], c[1][1], c[1][2]);
glMultiTexCoord3fARB(GL_TEXTURE0_ARB,c[2][0]/(v->xfSize),c[2][1]/(v->yfSize),c[2][2]/(v->zfSize));
glVertex3f(c[2][0], c[2][1], c[2][2]);
glMultiTexCoord3fARB(GL_TEXTURE0_ARB,c[3][0]/(v->xfSize),c[3][1]/(v->yfSize),c[3][2]/(v->zfSize));
glVertex3f(c[3][0], c[3][1], c[3][2]);
} glEnd();
}
//=========================================================== resetClips
//======================================================================
void R8kVolRen3D_sav::resetClips()
{
glDisable(GL_CLIP_PLANE0);
}
//======================================================== Setup Shaders
//======================================================================
void R8kVolRen3D_sav::setupTexUs()
{
#if 1
GlErr("set up texture units", "before texture0");
//texture 0 = data
glActiveTexture(GL_TEXTURE0_ARB); { //this is for the slice
glEnable(GL_TEXTURE_3D);
}
GlErr("set up texture units", "after texture0");
//texture 1 = VG tf
glActiveTexture(GL_TEXTURE1_ARB); { //this is for the transfer function
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, deptexName);
}
GlErr("set up texture units", "after texture1");
//texture 2 = shade volume
glActiveTexture(GL_TEXTURE2_ARB); { // for shading or clipping (not both)
glEnable(GL_TEXTURE_3D);
}
GlErr("set up texture units", "after texture2");
//texture 3 = H tf
glActiveTexture(GL_TEXTURE3_ARB); { //3rd & 4th axis, or clipping, or shadows
switch(gluvv.dmode){ //hey! we use this for 3rd & 4th axies
case GDM_VGH:
case GDM_V1GH:
case GDM_V2G:
case GDM_V2GH:
case GDM_V3:
case GDM_V3G:
case GDM_V4:
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, deptex2Name);
break;
case GDM_V1:
case GDM_V1G:
case GDM_V2:
case GDM_VGH_VG:
case GDM_VGH_V:
if(!gluvv.clip.ortho) break; //we want to take care of this elsewhere
default:
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
}
GlErr("set up texture units", "after texture3");
//texture 4 = cube map dependant texture
glActiveTexture(GL_TEXTURE4_ARB);{ //cube map
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, gluvv.light.cubeName);
}
GlErr("set up texture units", "after texture4");
//texture 5 = shadow texture
glActiveTexture(GL_TEXTURE5_ARB);{ //shadow
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, pbuffName);
}
GlErr("set up texture units", "after texture4");
#endif
}
void R8kVolRen3D_sav::resetTexUs()
{
//NOTE: you must completely un-bind any texture which will be copied to later
#if 1
glActiveTexture(GL_TEXTURE5_ARB); { //not used
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
glBindTexture(GL_TEXTURE_1D, 0);
}
glActiveTexture(GL_TEXTURE4_ARB); { //not used
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
glActiveTexture(GL_TEXTURE3_ARB); { //not used
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
glActiveTexture(GL_TEXTURE2_ARB); { //not used
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
glActiveTexture(GL_TEXTURE1_ARB); { //not used
glBindTexture(GL_TEXTURE_2D, 0); //this is because of the p-buffer
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
glActiveTexture(GL_TEXTURE0_ARB); { //not used
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
glBindTexture(GL_TEXTURE_1D, 0);
}
#endif
}
//===================================================== Setup Frag Shade
//======================================================================
void R8kVolRen3D_sav::setupFragShade(float ftb)
{
glEnable(GL_FRAGMENT_SHADER_ATI);
if(ftb <= 0){ //back to front
//shaded
if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
if(gluvv.light.shadow) //shaded & shadowed
glBindFragmentShaderATI(fsNames[6]);
else //shaded, no shadow
glBindFragmentShaderATI(fsNames[4]);
}
//shadowed
else if(!gluvv.light.shadow)
glBindFragmentShaderATI(fsNames[0]);
else //no shade, no shadow
glBindFragmentShaderATI(fsNames[2]);
}
else { //front to back
//shaded
if((gluvv.shade == gluvvShadeDiff) || (gluvv.shade == gluvvShadeDSpec)){
if(gluvv.light.shadow) //shaded & shadowed
glBindFragmentShaderATI(fsNames[7]);
else //shaded, no shadow
glBindFragmentShaderATI(fsNames[5]);
}
//shadowed
else if(!gluvv.light.shadow)
glBindFragmentShaderATI(fsNames[1]);
else //no shade, no shadow
glBindFragmentShaderATI(fsNames[3]);
}
if(gluvv.light.sill)
glBindFragmentShaderATI(fsNames[9]);
}
void R8kVolRen3D_sav::resetFragShade()
{
glBindFragmentShaderATI(0);
glDisable(GL_FRAGMENT_SHADER_ATI);
}
//====================================================== Set Up P-Buffer
//======================================================================
void R8kVolRen3D_sav::setupPBuff() //prepare pbuffer for rendering
{
if(gluvv.picking) return;
if(!gluvv.light.shadow) return;
pbuff->MakeCurrent(); {
GlErr("r8kvolren", "setupPbub()-start");
//compute the view-port for this projection
float winsz[3] = {.8, .8, .5};
float winszp[3];
translateV3WD(winszp, gluvv.light.pj,winsz);
xbias = winszp[0];
ybias = winszp[1];
if(gluvv.volren.sampleRate == gluvv.volren.goodSamp){
xscale = gluvv.light.gShadowQual;
yscale = gluvv.light.gShadowQual;
} else {
xscale = gluvv.light.iShadowQual;
yscale = gluvv.light.iShadowQual;
}
//This sets the projection to ortho with screen params = [0..buff-size]
glMatrixMode( GL_PROJECTION );{ //figure out the window size
glLoadIdentity();
glOrtho(0,gluvv.light.buffsz[0],0,gluvv.light.buffsz[1],1,3);
}
//eye = [0,0,2], lookat = [0,0,0], up = [0,1,0]
glMatrixMode(GL_MODELVIEW);{
glLoadIdentity();
gluLookAt(0,0,2,
0,0,0,
0,1,0);
}
if(gluvv.light.softShadow){ //soft shadows
glDisable(GL_BLEND); //blend in fragment shader
} else {
glEnable(GL_BLEND); //otherwise blend in frame buffer
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
//set some gl state
glDisable(GL_LIGHTING); //lighting makes it look bad
glDisable(GL_DEPTH_TEST); //no depth test
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); //clear the buffer
//setup texture units
//clear the shadow texture
glActiveTexture(GL_TEXTURE4_ARB); { // shadow texture
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
} //end texture 2
glActiveTexture(GL_TEXTURE5_ARB); { // shadow texture
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
} //end texture 2
glActiveTexture(GL_TEXTURE0_ARB);{ // bind shadow name for copying
glBindTexture(GL_TEXTURE_3D, 0);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, shadowName);
}
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0,
0, 0,
gluvv.light.buffsz[0], gluvv.light.buffsz[1]);
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
//end clear the shadow texture
GlErr("r8kvolren - setup pbuff", "before set tex units");
//texture 0 = data
glActiveTexture(GL_TEXTURE0_ARB); { //this is for the slice
glEnable(GL_TEXTURE_3D);
} //end texture 2
//texture 1 = VG tf
glActiveTexture(GL_TEXTURE1_ARB); { //this is for the transfer function
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, deptexName);
} //end texture 1
//texture 2 = H tf
glActiveTexture(GL_TEXTURE2_ARB); { //3rd & 4th axis, or clipping
switch(gluvv.dmode){ //hey! we use this for 3rd & 4th axies
case GDM_VGH:
case GDM_V1GH:
case GDM_V2G:
case GDM_V2GH:
case GDM_V3:
case GDM_V3G:
case GDM_V4:
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, deptex2Name);
break;
case GDM_V1:
case GDM_V1G:
case GDM_V2:
case GDM_VGH_VG:
case GDM_VGH_V:
if(!gluvv.clip.ortho) break; //we want to take care of this elsewhere
default:
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_3D);
}
} //end texture 3
GlErr("pbuffer::set up shader", "after texture2");
#if 0
glActiveTexture(GL_TEXTURE4_ARB); { // shadow texture
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, shadowName);
} //end texture 2
glActiveTexture(GL_TEXTURE5_ARB); { // shadow texture
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, shadowName);
} //end texture 2
#endif
//enable the fragment shader
glEnable(GL_FRAGMENT_SHADER_ATI);
if(gluvv.light.softShadow)
glBindFragmentShaderATI(pbfsNames[19]);
else
glBindFragmentShaderATI(pbfsNames[1]);
GlErr("volren", "end of setup pbuff");
} MakeCurrent();
GlErr("volren", "end end of setup pbuff");
}