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voronoi.cpp
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/*
Guodong Rong
voronoi.cpp
The main program using JFA to compute Voronoi diagram
Copyright (c) 2005-2006
School of Computing
National University of Singapore
All Rights Reserved.
*/
#include "voronoi.h"
#include <assert.h>
extern void Energyf(cudaGraphicsResource_t grSite, real* g, real* f, int w, int h, int nsite, const cudaStream_t& stream);
extern void ConvertSites(real* x, cudaGraphicsResource_t gr, int nsite, int screenw, const cudaStream_t& stream);
extern void InitSites(real* x, float* init_sites, int stride, int* nbd, real* l, real* u, int nsite, int screenw);
float* site_list_x = NULL;
float* site_list_x_bar = NULL;
float site_perturb_step = 0;
inline void CopySite(SiteType* dst, float* src, int n) {
for(int i = 0; i < n; i++) {
dst[i].vertices[0].x = src[2 * i];
dst[i].vertices[0].y = src[2 * i + 1];
}
}
inline void CopySite(float* dst, float* src, int n) {
memcpy(dst, src, n * 2 * sizeof(float));
}
inline void CopySite(float* dst, SiteType* src, int n) {
for(int i = 0; i < n; i++) {
dst[2 * i] = src[i].vertices[0].x;
dst[2 * i + 1] = src[i].vertices[0].y;
}
}
/******************************************************************************/
void CheckFramebufferStatus()
{
GLenum status;
status = (GLenum) glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
switch(status) {
case GL_FRAMEBUFFER_COMPLETE_EXT:
break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
printf("Unsupported framebuffer format\n");
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
printf("Framebuffer incomplete, missing attachment\n");
break;
//case GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT:
// printf("Framebuffer incomplete, duplicate attachment\n");
// break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
printf("Framebuffer incomplete, attached images must have same dimensions\n");
break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
printf("Framebuffer incomplete, attached images must have same format\n");
break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
printf("Framebuffer incomplete, missing draw buffer\n");
break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
printf("Framebuffer incomplete, missing read buffer\n");
break;
default:
exit(0);
}
}
#define BUFFER_OFFSET(i) ((char*)NULL + (i))
void DrawSites(bool FinalDrawSite, real* x, const cudaStream_t& stream)
{
int i, j;
int shift;
glPointSize(1);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, vboId);
/*
GLvoid* pointer = glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
//memcpy(pointer, site_list, sizeof(SiteType) * point_num);
VertexSiteType* sitelist = (VertexSiteType*)pointer;
for (i=0; i<site_num; i++)
{
sitelist[i].x = (x[i * 2] + 1.0) * 0.5 * (screenwidth-1) + 1;
sitelist[i].y = (x[i * 2 + 1] + 1.0) * 0.5 * (screenheight-1) + 1;
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);*/
ConvertSites(x, grVbo, point_num * 2, screenwidth, stream);
glVertexPointer(2, GL_FLOAT, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER_ARB, colorboId);
glColorPointer(4, GL_FLOAT, 0, 0);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glDrawArrays(GL_POINTS, 0, point_num);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
/*
glBegin(GL_POINTS);
for (i=0; i<site_num; i++)
{
glColor4fv(site_list[i].color);
glVertex2f(site_list[i].vertices[0].x, site_list[i].vertices[0].y);
}
glEnd();*/
}
void funcgrad(real* x, real& f, real* g, const cudaStream_t& stream)
{
int i,j;
get_timestamp(start_time_func);
/*
for (i=0; i<site_num; i++)
{
site_list[i].vertices[0].x = (x[i * 2] + 1.0) * 0.5 * (screenwidth-1) + 1;
site_list[i].vertices[0].y = (x[i * 2 + 1] + 1.0) * 0.5 * (screenheight-1) + 1;
}*/
//////////////////////////////////////////////
// First pass - Render the initial sites //
//////////////////////////////////////////////
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FB_objects);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_RECTANGLE_NV, Processed_Texture[0], 0);
CheckFramebufferStatus();
for (i=0; i<1; i++)
{
glDrawBuffer(fbo_attachments[i]);
glClearColor(-1, -1, -1, -1);
glClear(GL_COLOR_BUFFER_BIT);
}
glDrawBuffer(fbo_attachments[0]);
cgGLEnableProfile(VertexProfile);
cgGLEnableProfile(FragmentProfile);
cgGLBindProgram(VP_DrawSites);
cgGLBindProgram(FP_DrawSites);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(1, screenwidth+1, 1, screenheight+1);
glViewport(1, 1, screenwidth, screenheight);
DrawSites(false, x, stream);
glReadBuffer(fbo_attachments[0]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
//if (numIter==109)
//{
// GLubyte *buffer_screen = new GLubyte[screenwidth*screenheight*4];
// char rawname[40];
// glReadPixels(1,1,screenwidth,screenheight,GL_RGBA,GL_UNSIGNED_BYTE,buffer_screen);
// strcpy(rawname, "a.raw");
// std::ofstream myrawfile(rawname, std::ios::binary);
// for (j=screenheight-1; j>=0; j--)
// for (i=0; i<screenwidth; i++)
// {
// GLubyte r, g, b, value;
// r = (unsigned char) buffer_screen[(j*screenwidth+i)*4];
// g = (unsigned char) buffer_screen[(j*screenwidth+i)*4+1];
// b = (unsigned char) buffer_screen[(j*screenwidth+i)*4+2];
// if (r>0 || g>0 || b>0)
// value = 0;
// else
// value = 255;
// myrawfile << value << value << value;
// }
// myrawfile.close();
// delete buffer_screen;
//}
Current_Buffer = 1;
#ifdef DEBUG_TIME
glFinish();
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 1 time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
/////////////////////////////////////
// Second pass - Flood the sites //
/////////////////////////////////////
cgGLBindProgram(VP_Flood);
cgGLBindProgram(FP_Flood);
if (VP_Flood_Size != NULL)
cgSetParameter2f(VP_Flood_Size, screenwidth, screenheight);
bool ExitLoop = false;
bool SecondExit;
int steplength;;
SecondExit = (additional_passes==0);
bool PassesBeforeJFA;
PassesBeforeJFA = (additional_passes_before>0);
if (PassesBeforeJFA)
steplength = pow(2.0, (additional_passes_before-1));
else
steplength = (screenwidth>screenheight ? screenwidth : screenheight)/2;
while (!ExitLoop)
{
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[Current_Buffer],
GL_TEXTURE_RECTANGLE_NV, Processed_Texture[Current_Buffer], 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[Current_Buffer]);
glClearColor(-1, -1, -1, -1);
glClear(GL_COLOR_BUFFER_BIT);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
if (VP_Flood_Steplength != NULL)
cgSetParameter1d(VP_Flood_Steplength, steplength);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(1.0, float(screenheight+1));
glVertex2f(float(screenwidth+1), float(screenheight+1));
glVertex2f(float(screenwidth+1), 1.0);
glEnd();
glReadBuffer(fbo_attachments[Current_Buffer]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
if (steplength==1 && PassesBeforeJFA)
{
steplength = (screenwidth>screenheight ? screenwidth : screenheight)/2;
PassesBeforeJFA = false;
}
else if (steplength>1)
steplength /= 2;
else if (SecondExit)
ExitLoop = true;
else
{
steplength = pow(2.0, (additional_passes-1));
SecondExit = true;
}
Current_Buffer = 1-Current_Buffer;
}
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
#ifdef DEBUG_TIME
glFinish();
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 2 time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
////////////////////////////////
// Third pass, Compute energy //
////////////////////////////////
cgGLBindProgram(VP_Scatter);
cgGLBindProgram(FP_Scatter);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[0],
GL_TEXTURE_RECTANGLE_NV, Site_Texture, 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[0]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
if (VP_Scatter_Size != NULL)
cgSetParameter2f(VP_Scatter_Size, screenwidth, screenheight);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glCallList(ScreenPointsList);
glDisable(GL_BLEND);
/*
cutilSafeCall(cudaGraphicsMapResources(1, &grSite, 0));
cudaArray *in_array;
cutilSafeCall(cudaGraphicsSubResourceGetMappedArray(&in_array, grSite, 0, 0));
cutilSafeCall(cudaMemcpy2DFromArray(pReadBackValues, screenwidth * sizeof(float) * 4, in_array, sizeof(float) * 4, 1, screenwidth * sizeof(float) * 4, iSiteTextureHeight, cudaMemcpyDeviceToHost));
cutilSafeCall(cudaGraphicsUnmapResources(1, &grSite, 0));
/ *
glReadBuffer(fbo_attachments[0]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
glReadPixels(1, 1, screenwidth, iSiteTextureHeight, GL_RGBA, GL_FLOAT, pReadBackValues);
* /
f = 0;
for (i=0; i<site_num; i++)
{
f += pReadBackValues[i * 4 + 2];
g[i * 2] = 2 * pReadBackValues[i * 4]/ * /pReadBackValues[i*4+3]* /;
g[i * 2 + 1] = 2 * pReadBackValues[i * 4 + 1]/ * /pReadBackValues[i*4+3]* /;
}*/
Energyf(grSite, g, f_tb_dev, screenwidth, iSiteTextureHeight, site_num, stream);
lbfgsbcuda::CheckBuffer(g, site_num * 2, site_num * 2);
#ifdef DEBUG_TIME
glFinish();
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step Scatter time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
if (bShowTestResults)
{
///////////////////////////////////
// Test pass, Display the result //
///////////////////////////////////
cgGLBindProgram(VP_FinalRender);
cgGLBindProgram(FP_FinalRender);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[2], GL_RENDERBUFFER_EXT, RB_object);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[2]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
if (FP_FinalRender_Size != NULL)
cgSetParameter2f(FP_FinalRender_Size, screenwidth, screenheight);
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
glActiveTextureARB(GL_TEXTURE2_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Color_Texture);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(1.0, float(screenheight+1));
glVertex2f(float(screenwidth+1), float(screenheight+1));
glVertex2f(float(screenwidth+1), 1.0);
glEnd();
nFuncCall++;
if (bNewIteration)
{
bNewIteration = false;
glReadBuffer(fbo_attachments[2]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
//if (numIter==109)
//{
// GLubyte *buffer_screen = new GLubyte[screenwidth*screenheight*4];
// char rawname[40];
// glReadPixels(1,1,screenwidth,screenheight,GL_RGBA,GL_UNSIGNED_BYTE,buffer_screen);
// strcpy(rawname, "a.raw");
// std::ofstream myrawfile(rawname, std::ios::binary);
// for (j=screenheight-1; j>=0; j--)
// for (i=0; i<screenwidth; i++)
// {
// myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4];
// myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4+1];
// myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4+2];
// }
// myrawfile.close();
// delete buffer_screen;
//}
}
Current_Buffer = 1-Current_Buffer;
}
glFinish();
get_timestamp(end_time_func);
elapsed_time_func = (end_time_func-start_time_func);
total_time_func += elapsed_time_func;
f = *f_tb_host;
}
real BFGSOptimization()
{
// Use L-BFGS method to compute new sites
const real epsg = EPSG;
const real epsf = EPSF;
const real epsx = EPSX;
const int maxits = MAXITS;
stpscal = 2.75f; //Set for different problems!
int info;
total_time = 0;
total_time_func = 0;
real* x;
int* nbd;
real* l;
real* u;
memAlloc<real>(&x, site_num * 2);
memAlloc<int>(&nbd, site_num * 2);
memAlloc<real>(&l, site_num * 2);
memAlloc<real>(&u, site_num * 2);
memAllocHost<real>(&f_tb_host, &f_tb_dev, 1);
InitSites(x, (float*)site_list_dev, sizeof(SiteType) / sizeof(float), nbd, l, u, site_num * 2, screenwidth);
//lbfgsbcuda::CheckBuffer(x, site_num * 2, site_num * 2);
/*
real a1 = 1 / real(screenwidth - 1) * 2.0;
real a2 = -a1 - 1.0;
for (int i = 0; i < site_num; i++)
{
x[i * 2] = site_list[i].vertices[0].x * a1 + a2;
x[i * 2 + 1] = site_list[i].vertices[0].y * a1 + a2;
nbd[i * 2] = nbd[i * 2 + 1] = 2;
l[i * 2] = l[i * 2 + 1] = -1.0;
u[i * 2] = u[i * 2 + 1] = 1.0;
}
*/
printf("Start optimization...");
get_timestamp(start_time);
stpscal = 2.75f;
int m = 8;
if (site_num * 2 < m)
m = site_num * 2;
for (int temp=0; temp<1; temp++)
{
bNewIteration = true;
lbfgsbminimize(site_num*2, m, x, epsg, epsf, epsx, maxits, nbd, l, u, info);
//printf("Ending code:%d\n", info);
}
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Done.\n JFA Time: %lf\tBFGS Time: %lf\tTotal time: %lf\t", total_time_func, elapsed_time - total_time_func, elapsed_time);
bReCompute = false;
real f = DrawVoronoi(x);
real* x_host = new real[site_num * 2];
memCopy(x_host, x, site_num * 2 * sizeof(real), cudaMemcpyDeviceToHost);
for(int i = 0; i < site_num; i++) {
site_list[i].vertices[0].x = x_host[i * 2] * (screenwidth-1.0) + 1.0;
site_list[i].vertices[0].y = x_host[i * 2 + 1] * (screenwidth-1.0) + 1.0;
}
delete[] x_host;
memFreeHost(f_tb_host);
memFree(x);
memFree(nbd);
memFree(l);
memFree(u);
return f;
}
real DrawVoronoi(real* xx)
{
int i,j;
real fEnergy = 1e20;
GLfloat *buffer_screen = new GLfloat[screenwidth*screenheight*4];
//FILE *site_file = fopen("result-uniform-CPU.txt", "r");
#ifdef DEBUG_TIME
total_time = 0;
get_timestamp(start_time);
#endif
//////////////////////////////////////////////
// First pass - Render the initial sites //
//////////////////////////////////////////////
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FB_objects);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_RECTANGLE_NV, Processed_Texture[0], 0);
CheckFramebufferStatus();
for (i=0; i<1; i++)
{
glDrawBuffer(fbo_attachments[i]);
glClearColor(-1, -1, -1, -1);
glClear(GL_COLOR_BUFFER_BIT);
}
glDrawBuffer(fbo_attachments[0]);
cgGLEnableProfile(VertexProfile);
cgGLEnableProfile(FragmentProfile);
cgGLBindProgram(VP_DrawSites);
cgGLBindProgram(FP_DrawSites);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(1, screenwidth+1, 1, screenheight+1);
glViewport(1, 1, screenwidth, screenheight);
DrawSites(false, xx, NULL);
glReadBuffer(fbo_attachments[0]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
Current_Buffer = 1;
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 1 time: %f\n", elapsed_time);
#endif
bool Converged = false;
while (!Converged)
{
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
/////////////////////////////////////
// Second pass - Flood the sites //
/////////////////////////////////////
cgGLBindProgram(VP_Flood);
cgGLBindProgram(FP_Flood);
if (VP_Flood_Size != NULL)
cgSetParameter2f(VP_Flood_Size, screenwidth, screenheight);
bool ExitLoop = false;
bool SecondExit;
int steplength;;
SecondExit = (additional_passes==0);
bool PassesBeforeJFA;
PassesBeforeJFA = (additional_passes_before>0);
if (PassesBeforeJFA)
steplength = pow(2.0, (additional_passes_before-1));
else
steplength = (screenwidth>screenheight ? screenwidth : screenheight)/2;
while (!ExitLoop)
{
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[Current_Buffer],
GL_TEXTURE_RECTANGLE_NV, Processed_Texture[Current_Buffer], 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[Current_Buffer]);
glClearColor(-1, -1, -1, -1);
glClear(GL_COLOR_BUFFER_BIT);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
if (VP_Flood_Steplength != NULL)
cgSetParameter1d(VP_Flood_Steplength, steplength);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(1.0, float(screenheight+1));
glVertex2f(float(screenwidth+1), float(screenheight+1));
glVertex2f(float(screenwidth+1), 1.0);
glEnd();
glReadBuffer(fbo_attachments[Current_Buffer]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
if (steplength==1 && PassesBeforeJFA)
{
steplength = (screenwidth>screenheight ? screenwidth : screenheight)/2;
PassesBeforeJFA = false;
}
else if (steplength>1)
steplength /= 2;
else if (SecondExit)
ExitLoop = true;
else
{
steplength = pow(2.0, (additional_passes-1));
SecondExit = true;
}
Current_Buffer = 1-Current_Buffer;
}
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
glReadPixels(1,1,screenwidth,screenheight,GL_RGBA,GL_FLOAT,buffer_screen);
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 2 time: %f\n", elapsed_time);
#endif
///////////////////////////////
// Test pass, Compute energy //
///////////////////////////////
int Current_Energy_Buffer = 0;
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[0],
GL_TEXTURE_RECTANGLE_NV, Energy_Texture[Current_Energy_Buffer], 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[0]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
cgGLBindProgram(VP_ComputeEnergyCentroid);
cgGLBindProgram(FP_ComputeEnergyCentroid);
if (FP_ComputeEnergyCentroid_Size != NULL)
cgSetParameter2f(FP_ComputeEnergyCentroid_Size, screenwidth, screenheight);
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, Processed_Texture[1-Current_Buffer]);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(float(screenwidth+1), 1.0);
glVertex2f(float(screenwidth+1), float(screenheight+1));
glVertex2f(1.0, float(screenheight+1));
glEnd();
glReadBuffer(fbo_attachments[0]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
Current_Energy_Buffer = 1-Current_Energy_Buffer;
//////////////////////
// perform reduction
//////////////////////
cgGLBindProgram(VP_Deduction);
cgGLBindProgram(FP_Deduction);
bool ExitEnergyLoop = false;
int quad_size = int((screenwidth>screenheight?screenwidth:screenheight)/2.0+0.5);
while (!ExitEnergyLoop)
{
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[0],
GL_TEXTURE_RECTANGLE_NV, Energy_Texture[Current_Energy_Buffer], 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[0]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, Energy_Texture[1-Current_Energy_Buffer]);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(float(quad_size+1), 1.0);
glVertex2f(float(quad_size+1), float(quad_size+1));
glVertex2f(1.0, float(quad_size+1));
glEnd();
glReadBuffer(fbo_attachments[0]);
//imdebugPixelsf(0, 0, GIMwidth+2, GIMheight+2, GL_RGBA);
if (quad_size>1)
{
int temp = quad_size/2;
quad_size = temp*2==quad_size ? temp : temp+1;
}
else
ExitEnergyLoop = true;
Current_Energy_Buffer = 1-Current_Energy_Buffer;
}
float total_sum[4];
glReadBuffer(fbo_attachments[0]);
glReadPixels(1, 1, 1, 1, GL_RGBA, GL_FLOAT, &total_sum);
printf("Energy: %f\n", total_sum[0]);
fEnergy = total_sum[0];
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
/*
///////////////////////////////////
// Test pass, Display the result //
///////////////////////////////////
cgGLBindProgram(VP_FinalRender);
cgGLBindProgram(FP_FinalRender);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[2], GL_RENDERBUFFER_EXT, RB_object);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[2]);
if (FP_FinalRender_Size != NULL)
cgSetParameter2f(FP_FinalRender_Size, screenwidth, screenheight);
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
glActiveTextureARB(GL_TEXTURE2_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Color_Texture);
glBegin(GL_QUADS);
glVertex2f(1.0, 1.0);
glVertex2f(1.0, float(screenheight+1));
glVertex2f(float(screenwidth+1), float(screenheight+1));
glVertex2f(float(screenwidth+1), 1.0);
glEnd();
glReadBuffer(fbo_attachments[2]);*/
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
/*
GLubyte *buffer_screen = new GLubyte[screenwidth*screenheight*4];
char rawname[40];
glReadPixels(1,1,screenwidth,screenheight,GL_RGBA,GL_UNSIGNED_BYTE,buffer_screen);
strcpy(rawname, "a.raw");
std::ofstream myrawfile(rawname, std::ios::binary);
for (j=screenheight-1; j>=0; j--)
for (i=0; i<screenwidth; i++)
{
myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4];
myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4+1];
myrawfile << (unsigned char) buffer_screen[(j*screenwidth+i)*4+2];
}
myrawfile.close();
delete buffer_screen;*/
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step test time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
//////////////////////////////////////////
// Third pass - Scatter points to sites //
//////////////////////////////////////////
cgGLBindProgram(VP_ScatterCentroid);
cgGLBindProgram(FP_ScatterCentroid);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[0],
GL_TEXTURE_RECTANGLE_NV, Site_Texture, 0);
CheckFramebufferStatus();
glDrawBuffer(buffers[0]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
if (VP_ScatterCentroid_Size != NULL)
cgSetParameter2f(VP_ScatterCentroid_Size, screenwidth, screenheight);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[1-Current_Buffer]);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glBegin(GL_POINTS);
for (i=0; i<screenwidth; i++)
for (j=0; j<screenheight; j++)
glVertex2f(i+1.5, j+1.5);
glEnd();
glDisable(GL_BLEND);
/*
glReadBuffer(buffers[0]);
float *tempTest = new float[screenwidth*10*4];
glReadPixels(1, 1, screenwidth, 10, GL_RGBA, GL_FLOAT, tempTest);
for (int index=0; index<site_num; index++)
{
if (tempTest[index*4+3]<=0)
{
imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
printf("Error! Empty VC found!\n");
exit(0);
}
}*/
Current_Buffer = 1-Current_Buffer;
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 3 time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
///////////////////////////////////////
// Fourth pass - Test stop condition //
///////////////////////////////////////
cgGLBindProgram(VP_DrawSitesOQ);
cgGLBindProgram(FP_DrawSitesOQ);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[2], GL_RENDERBUFFER_EXT, RB_object);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[2]);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
if (VP_DrawSitesOQ_Size != NULL)
cgSetParameter2f(VP_DrawSitesOQ_Size, screenwidth, screenheight);
//Bind & enable shadow map texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Site_Texture);
glActiveTextureARB(GL_TEXTURE1_ARB);
glBindTexture(GL_TEXTURE_RECTANGLE_NV, Processed_Texture[Current_Buffer]);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glDepthMask(GL_FALSE);
glBeginQueryARB(GL_SAMPLES_PASSED_ARB, occlusion_query);
glBegin(GL_POINTS);
for (i=0; i<site_num; i++)
{
float xx, yy;
xx = i%screenwidth+1.5;
yy = i/screenheight+1.5;
glTexCoord1f(i);
glVertex2f(xx, yy);
}
glEnd();
glEndQueryARB(GL_SAMPLES_PASSED_ARB);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDepthMask(GL_TRUE);
glReadBuffer(fbo_attachments[2]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
do{
glGetQueryObjectivARB(occlusion_query, GL_QUERY_RESULT_AVAILABLE_ARB, &oq_available);
}while(oq_available);
glGetQueryObjectuivARB(occlusion_query, GL_QUERY_RESULT_ARB, &sampleCount);
printf("sample count: %d\n", sampleCount);
if (sampleCount==0)
Converged = true;
static int temp = 0;
if (temp++>=0)
Converged = true;
if (Converged)
{
#ifdef DEBUG_TIME
printf("Total time: %f\n", total_time);
#endif
//exit(0);
break;
}
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 4 time: %f\n", elapsed_time);
#endif
#ifdef DEBUG_TIME
get_timestamp(start_time);
#endif
//////////////////////////////////////////////
// Fifth pass - Draw sites at new positions //
//////////////////////////////////////////////
cgGLBindProgram(VP_DrawNewSites);
cgGLBindProgram(FP_DrawNewSites);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, fbo_attachments[Current_Buffer],
GL_TEXTURE_RECTANGLE_NV, Processed_Texture[Current_Buffer], 0);
CheckFramebufferStatus();
glDrawBuffer(fbo_attachments[Current_Buffer]);
glClearColor(-1, -1, -1, -1);
glClear(GL_COLOR_BUFFER_BIT);
if (VP_DrawNewSites_Size != NULL)
cgSetParameter2f(VP_DrawNewSites_Size, screenwidth, screenheight);
glBegin(GL_POINTS);
for (i=0; i<site_num; i++)
{
float xx, yy;
xx = i%screenwidth+1.5;
yy = i/screenheight+1.5;
glTexCoord1f(i);
glVertex2f(xx, yy);
}
glEnd();
glReadBuffer(fbo_attachments[Current_Buffer]);
//imdebugPixelsf(0, 0, screenwidth+2, screenheight+2, GL_RGBA);
Current_Buffer = 1-Current_Buffer;
#ifdef DEBUG_TIME
get_timestamp(end_time);
elapsed_time = (end_time-start_time);
total_time += elapsed_time;
printf("Step 5 time: %f\n", elapsed_time);
#endif
}
cgGLDisableProfile(VertexProfile);
cgGLDisableProfile(FragmentProfile);
////////////////////
// compute measures
////////////////////
bool *bOnBoundary = new bool[site_num];
bool *bIsHexagon = new bool[site_num];
int *nNeighbors = new int[site_num*7];
real *dDiameter = new real[site_num];
real *dNeighborDist = new real[site_num];
float site_pos[2], x, y, dist, neighbor_pos[2];
int id, drow, dcol, nrow, ncol, neighbor_id, k;
real dMaxDiameter, chi_id, chi;
int nHex, nVC;
for (id=0; id<site_num; id++)
{
bOnBoundary[id] = false;
bIsHexagon[id] = true;
nNeighbors[id*7] = 0;
for (k=1; k<7; k++)
nNeighbors[id*7+k] = -1;
dDiameter[id] = -1;
dNeighborDist[id] = 2*(screenwidth+screenheight);
}
dMaxDiameter = -1;
chi = -1;
nHex = nVC = 0;
for (i=0; i<screenheight; i++)
{
for (j=0; j<screenwidth; j++)
{
site_pos[0] = buffer_screen[i*screenwidth*4+j*4];
site_pos[1] = buffer_screen[i*screenwidth*4+j*4+1];
id = int(buffer_screen[i*screenwidth*4+j*4+2]);
x = j+1.5;
y = i+1.5;
site_pos[0] = (site_pos[0]-1)/screenwidth*2-1;
site_pos[1] = (site_pos[1]-1)/screenheight*2-1;
x = (x-1)/screenwidth*2-1;
y = (y-1)/screenheight*2-1;
dist = (x-site_pos[0])*(x-site_pos[0])+(y-site_pos[1])*(y-site_pos[1]);
dist = sqrt(dist);
dDiameter[id] = dDiameter[id]<dist ? dist : dDiameter[id];
// traverse 9 neighbors
for (drow=-1; drow<=1; drow++)
{
for (dcol=-1; dcol<=1; dcol++)
{
if (drow==0 && dcol==0)
continue;
nrow = i+drow;
ncol = j+dcol;
if (nrow<0 || nrow>=screenheight || ncol<0 || ncol>=screenwidth)
{
bOnBoundary[id] = true;
continue;
}
neighbor_pos[0] = buffer_screen[nrow*screenwidth*4+ncol*4];
neighbor_pos[1] = buffer_screen[nrow*screenwidth*4+ncol*4+1];
neighbor_id = int(buffer_screen[nrow*screenwidth*4+ncol*4+2]);