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GPUParticles: Put it in its own file

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Disable rain while doing ping-pong between os to get windows opengl callback

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14814 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj 2013-12-27 20:56:29 +00:00
parent 6d0e6a67b2
commit df2bd304ab
4 changed files with 292 additions and 262 deletions
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5
sources.cmake
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@ -34,6 +34,7 @@ src/graphics/camera.cpp
src/graphics/CBatchingMesh.cpp
src/graphics/explosion.cpp
src/graphics/glow.cpp
src/graphics/gpuparticles.cpp
src/graphics/hardware_skinning.cpp
src/graphics/hit_sfx.cpp
src/graphics/irr_driver.cpp
@ -478,8 +479,8 @@ src/modes/tutorial_world.hpp
src/modes/world.hpp
src/modes/world_status.hpp
src/modes/world_with_rank.hpp
src/network/event.hpp
src/network/client_network_manager.hpp
src/network/event.hpp
src/network/game_setup.hpp
src/network/network_interface.hpp
src/network/network_manager.hpp
@ -636,10 +637,10 @@ src/tracks/track_object_presentation.hpp
src/tracks/track_sector.hpp
src/utils/aligned_array.hpp
src/utils/constants.hpp
src/utils/crash_reporting.hpp
src/utils/debug.hpp
src/utils/helpers.hpp
src/utils/interpolation_array.hpp
src/utils/crash_reporting.hpp
src/utils/leak_check.hpp
src/utils/log.hpp
src/utils/no_copy.hpp

210
src/graphics/gpuparticles.cpp Normal file
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@ -0,0 +1,210 @@
#if 0
#include "graphics/irr_driver.hpp"
#include "gpuparticles.h"
#include <fstream>
#include "io/file_manager.hpp"
#include "config/user_config.hpp"
#include <ICameraSceneNode.h>
void initGL()
{
/* glGenTransformFeedbacks = (PFNGLGENTRANSFORMFEEDBACKSPROC)IRR_OGL_LOAD_EXTENSION("glGenTransformFeedbacks");
glBindTransformFeedback = (PFNGLBINDTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glBindTransformFeedback");
glDrawTransformFeedback = (PFNGLDRAWTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glDrawTransformFeedback");
glBeginTransformFeedback = (PFNGLBEGINTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glBeginTransformFeedback");
glEndTransformFeedback = (PFNGLENDTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glEndTransformFeedback");
glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)IRR_OGL_LOAD_EXTENSION("glBindBufferBase");
glGenBuffers = (PFNGLGENBUFFERSPROC)IRR_OGL_LOAD_EXTENSION("glGenBuffers");
glBindBuffer = (PFNGLBINDBUFFERPROC)IRR_OGL_LOAD_EXTENSION("glBindBuffer");
glBufferData = (PFNGLBUFFERDATAPROC)IRR_OGL_LOAD_EXTENSION("glBufferData");
glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)IRR_OGL_LOAD_EXTENSION("glVertexAttribPointer");
glCreateShader = (PFNGLCREATESHADERPROC)IRR_OGL_LOAD_EXTENSION("glCreateShader");
glCompileShader = (PFNGLCOMPILESHADERPROC)IRR_OGL_LOAD_EXTENSION("glCompileShader");
glShaderSource = (PFNGLSHADERSOURCEPROC)IRR_OGL_LOAD_EXTENSION("glShaderSource");
glCreateProgram = (PFNGLCREATEPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glCreateProgram");
glAttachShader = (PFNGLATTACHSHADERPROC)IRR_OGL_LOAD_EXTENSION("glAttachShader");
glLinkProgram = (PFNGLLINKPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glLinkProgram");
glUseProgram = (PFNGLUSEPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glUseProgram");
glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)IRR_OGL_LOAD_EXTENSION("glEnableVertexAttribArray");
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)IRR_OGL_LOAD_EXTENSION("glGetUniformLocation");
glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)IRR_OGL_LOAD_EXTENSION("glUniformMatrix4fv");
glUniform1f = (PFNGLUNIFORM1FPROC)IRR_OGL_LOAD_EXTENSION("glUniform1f");
glUniform3f = (PFNGLUNIFORM3FPROC)IRR_OGL_LOAD_EXTENSION("glUniform3f");
glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)IRR_OGL_LOAD_EXTENSION("glDisableVertexAttribArray");
glDeleteShader = (PFNGLDELETESHADERPROC)IRR_OGL_LOAD_EXTENSION("glDeleteShader");
glGetShaderiv = (PFNGLGETSHADERIVPROC)IRR_OGL_LOAD_EXTENSION("glGetShaderiv");
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)IRR_OGL_LOAD_EXTENSION("glGetShaderInfoLog");
#ifdef _IRR_WINDOWS_API_
glActiveTexture = (PFNGLACTIVETEXTUREPROC)IRR_OGL_LOAD_EXTENSION("glActiveTexture");
#endif
glUniform2f = (PFNGLUNIFORM2FPROC)IRR_OGL_LOAD_EXTENSION("glUniform2f");
glUniform1i = (PFNGLUNIFORM1IPROC)IRR_OGL_LOAD_EXTENSION("glUniform1i");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)IRR_OGL_LOAD_EXTENSION("glGetProgramiv");
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)IRR_OGL_LOAD_EXTENSION("glGetProgramInfoLog");
glTransformFeedbackVaryings = (PFNGLTRANSFORMFEEDBACKVARYINGSPROC)IRR_OGL_LOAD_EXTENSION("glTransformFeedbackVaryings");*/
}
// Mostly from shader tutorial
static
GLuint LoadShader(const char * file, unsigned type) {
GLuint Id = glCreateShader(type);
std::string Code;
std::ifstream Stream(file, std::ios::in);
if (Stream.is_open())
{
std::string Line = "";
while (getline(Stream, Line))
Code += "\n" + Line;
Stream.close();
}
GLint Result = GL_FALSE;
int InfoLogLength;
printf("Compiling shader : %s\n", file);
char const * SourcePointer = Code.c_str();
int length = strlen(SourcePointer);
glShaderSource(Id, 1, &SourcePointer, &length);
glCompileShader(Id);
glGetShaderiv(Id, GL_COMPILE_STATUS, &Result);
if (Result == GL_FALSE) {
glGetShaderiv(Id, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetShaderInfoLog(Id, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
return Id;
}
GLuint LoadProgram(const char * vertex_file_path, const char * fragment_file_path) {
GLuint VertexShaderID = LoadShader(vertex_file_path, GL_VERTEX_SHADER);
GLuint FragmentShaderID = LoadShader(fragment_file_path, GL_FRAGMENT_SHADER);
GLuint ProgramID = glCreateProgram();
glAttachShader(ProgramID, VertexShaderID);
glAttachShader(ProgramID, FragmentShaderID);
glLinkProgram(ProgramID);
GLint Result = GL_FALSE;
int InfoLogLength;
glGetProgramiv(ProgramID, GL_LINK_STATUS, &Result);
if (Result == GL_FALSE) {
glGetProgramiv(ProgramID, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetProgramInfoLog(ProgramID, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
glDeleteShader(VertexShaderID);
glDeleteShader(FragmentShaderID);
return ProgramID;
}
GLuint LoadTFBProgram(const char * vertex_file_path, const char **varyings, unsigned varyingscount) {
GLuint Shader = LoadShader(vertex_file_path, GL_VERTEX_SHADER);
GLuint Program = glCreateProgram();
glAttachShader(Program, Shader);
glTransformFeedbackVaryings(Program, varyingscount, varyings, GL_INTERLEAVED_ATTRIBS);
glLinkProgram(Program);
GLint Result = GL_FALSE;
int InfoLogLength;
glGetProgramiv(Program, GL_LINK_STATUS, &Result);
if (Result == GL_FALSE) {
glGetProgramiv(Program, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetProgramInfoLog(Program, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
glDeleteShader(Shader);
return Program;
}
GLuint getTextureGLuint(irr::video::ITexture *tex) {
return static_cast<irr::video::COpenGLTexture*>(tex)->getOpenGLTextureName();
}
void bindUniformToTextureUnit(GLuint location, GLuint texid, unsigned textureUnit) {
glActiveTexture(GL_TEXTURE0 + textureUnit);
glBindTexture(GL_TEXTURE_2D, texid);
glUniform1i(location, textureUnit);
}
GPUParticle::GPUParticle(unsigned c, float *initialSamples, GLuint tex, GLuint rtt) :
count(c), texture(tex), normal_and_depth(rtt) {
initGL();
glGenBuffers(2, tfb_vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[0]);
glBufferData(GL_ARRAY_BUFFER, 3 * count * sizeof(float), initialSamples, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[1]);
glBufferData(GL_ARRAY_BUFFER, 3 * count * sizeof(float), 0, GL_STREAM_DRAW);
RenderProgram = LoadProgram(file_manager->getAsset("shaders/rain.vert").c_str(), file_manager->getAsset("shaders/rain.frag").c_str());
loc_screenw = glGetUniformLocation(RenderProgram, "screenw");
loc_screen = glGetUniformLocation(RenderProgram, "screen");
loc_invproj = glGetUniformLocation(RenderProgram, "invproj");
texloc_tex = glGetUniformLocation(RenderProgram, "tex");
texloc_normal_and_depths = glGetUniformLocation(RenderProgram, "normals_and_depth");
const char *varyings[] = {"currentPosition"};
SimulationProgram = LoadTFBProgram(file_manager->getAsset("shaders/rainsim.vert").c_str(), varyings, 1);
loc_campos = glGetUniformLocation(SimulationProgram, "campos");
loc_viewm = glGetUniformLocation(SimulationProgram, "viewm");
loc_time = glGetUniformLocation(SimulationProgram, "time");
}
void GPUParticle::simulate() {
glUseProgram(SimulationProgram);
const float time = irr_driver->getDevice()->getTimer()->getTime() / 90.0f;
const irr::core::matrix4 viewm = irr_driver->getVideoDriver()->getTransform(irr::video::ETS_VIEW);
const irr::core::vector3df campos = irr_driver->getSceneManager()->getActiveCamera()->getPosition();
glEnable(GL_RASTERIZER_DISCARD);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, tfb_vertex_buffer[1]);
glUniformMatrix4fv(loc_viewm, 1, GL_FALSE, viewm.pointer());
glUniform1f(loc_time, time);
glUniform3f(loc_campos, campos.X, campos.Y, campos.Z);
glBeginTransformFeedback(GL_POINTS);
glDrawArrays(GL_POINTS, 0, count);
glEndTransformFeedback();
glDisable(GL_RASTERIZER_DISCARD);
}
void GPUParticle::render() {
const float screenw = (float)UserConfigParams::m_width;
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
glEnable(GL_POINT_SPRITE);
glUseProgram(RenderProgram);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[1]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
float screen[2] = {
(float)UserConfigParams::m_width,
(float)UserConfigParams::m_height
};
irr::core::matrix4 invproj = irr_driver->getVideoDriver()->getTransform(irr::video::ETS_PROJECTION);
invproj.makeInverse();
bindUniformToTextureUnit(texloc_tex, texture, 0);
bindUniformToTextureUnit(texloc_normal_and_depths, normal_and_depth, 1);
glUniformMatrix4fv(loc_invproj, 1, GL_FALSE, invproj.pointer());
glUniform2f(loc_screen, screen[0], screen[1]);
glUniform1f(loc_screenw, screenw);
glDrawArrays(GL_POINTS, 0, count);
glDisableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glActiveTexture(GL_TEXTURE0);
glDisable(GL_VERTEX_PROGRAM_POINT_SIZE);
}
#endif

73
src/graphics/gpuparticles.h Normal file
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@ -0,0 +1,73 @@
#if 0
#ifndef GPUPARTICLES_H
#define GPUPARTICLES_H
#define GL_GLEXT_PROTOTYPES 1
#include "graphics/glwrap.hpp"
#include <ISceneManager.h>
/*#ifdef _IRR_WINDOWS_API_
#define IRR_OGL_LOAD_EXTENSION(X) wglGetProcAddress(reinterpret_cast<const char*>(X))
#else
#include <GL/glx.h>
#define IRR_OGL_LOAD_EXTENSION(X) glXGetProcAddress(reinterpret_cast<const GLubyte*>(X))
#endif
PFNGLGENTRANSFORMFEEDBACKSPROC glGenTransformFeedbacks;
PFNGLBINDTRANSFORMFEEDBACKPROC glBindTransformFeedback;
PFNGLDRAWTRANSFORMFEEDBACKPROC glDrawTransformFeedback;
PFNGLBEGINTRANSFORMFEEDBACKPROC glBeginTransformFeedback;
PFNGLENDTRANSFORMFEEDBACKPROC glEndTransformFeedback;
PFNGLTRANSFORMFEEDBACKVARYINGSPROC glTransformFeedbackVaryings;
PFNGLBINDBUFFERBASEPROC glBindBufferBase;
PFNGLGENBUFFERSPROC glGenBuffers;
PFNGLBINDBUFFERPROC glBindBuffer;
PFNGLBUFFERDATAPROC glBufferData;
PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
PFNGLCREATESHADERPROC glCreateShader;
PFNGLCOMPILESHADERPROC glCompileShader;
PFNGLSHADERSOURCEPROC glShaderSource;
PFNGLCREATEPROGRAMPROC glCreateProgram;
PFNGLATTACHSHADERPROC glAttachShader;
PFNGLLINKPROGRAMPROC glLinkProgram;
PFNGLUSEPROGRAMPROC glUseProgram;
PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv;
PFNGLUNIFORM1FPROC glUniform1f;
PFNGLUNIFORM3FPROC glUniform3f;
PFNGLDELETESHADERPROC glDeleteShader;
PFNGLGETSHADERIVPROC glGetShaderiv;
PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
#ifdef _IRR_WINDOWS_API_
PFNGLACTIVETEXTUREPROC glActiveTexture;
#endif
PFNGLUNIFORM2FPROC glUniform2f;
PFNGLUNIFORM1IPROC glUniform1i;
PFNGLGETPROGRAMIVPROC glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;*/
void initGL();
GLuint LoadProgram(const char * vertex_file_path, const char * fragment_file_path);
GLuint LoadTFBProgram(const char * vertex_file_path, const char **varyings, unsigned varyingscount);
GLuint getTextureGLuint(irr::video::ITexture *tex);
void bindUniformToTextureUnit(GLuint location, GLuint texid, unsigned textureUnit);
class GPUParticle {
private:
unsigned count;
GLuint SimulationProgram, RenderProgram, tfb_vertex_buffer[2];
GLuint texture, normal_and_depth;
GLuint loc_campos, loc_viewm, loc_time;
GLuint loc_screenw, loc_screen, loc_invproj, texloc_tex, texloc_normal_and_depths;
public:
GPUParticle(unsigned c, float *initialSamples, GLuint tex, GLuint rtt);
void simulate();
void render();
};
#endif // GPUPARTICLES_H
#endif

266
src/graphics/rain.cpp
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@ -32,271 +32,17 @@
#include <ISceneManager.h>
#include <SMeshBuffer.h>
#include "graphics/gpuparticles.h"
using namespace video;
using namespace scene;
using namespace core;
// OPENGL PARTICLE SYSTEM
#include <ICameraSceneNode.h>
#include "../source/Irrlicht/COpenGLExtensionHandler.h"
#include "io/file_manager.hpp"
#ifdef _IRR_WINDOWS_API_
#define IRR_OGL_LOAD_EXTENSION(X) wglGetProcAddress(reinterpret_cast<const char*>(X))
#else
#include <GL/glx.h>
#define IRR_OGL_LOAD_EXTENSION(X) glXGetProcAddress(reinterpret_cast<const GLubyte*>(X))
#endif
PFNGLGENTRANSFORMFEEDBACKSPROC glGenTransformFeedbacks;
PFNGLBINDTRANSFORMFEEDBACKPROC glBindTransformFeedback;
PFNGLDRAWTRANSFORMFEEDBACKPROC glDrawTransformFeedback;
PFNGLBEGINTRANSFORMFEEDBACKPROC glBeginTransformFeedback;
PFNGLENDTRANSFORMFEEDBACKPROC glEndTransformFeedback;
PFNGLTRANSFORMFEEDBACKVARYINGSPROC glTransformFeedbackVaryings;
PFNGLBINDBUFFERBASEPROC glBindBufferBase;
PFNGLGENBUFFERSPROC glGenBuffers;
PFNGLBINDBUFFERPROC glBindBuffer;
PFNGLBUFFERDATAPROC glBufferData;
PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
PFNGLCREATESHADERPROC glCreateShader;
PFNGLCOMPILESHADERPROC glCompileShader;
PFNGLSHADERSOURCEPROC glShaderSource;
PFNGLCREATEPROGRAMPROC glCreateProgram;
PFNGLATTACHSHADERPROC glAttachShader;
PFNGLLINKPROGRAMPROC glLinkProgram;
PFNGLUSEPROGRAMPROC glUseProgram;
PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
PFNGLUNIFORMMATRIX4FVPROC glUniformMatrix4fv;
PFNGLUNIFORM1FPROC glUniform1f;
PFNGLUNIFORM3FPROC glUniform3f;
PFNGLDELETESHADERPROC glDeleteShader;
PFNGLGETSHADERIVPROC glGetShaderiv;
PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
#ifdef _IRR_WINDOWS_API_
PFNGLACTIVETEXTUREPROC glActiveTexture;
#endif
PFNGLUNIFORM2FPROC glUniform2f;
PFNGLUNIFORM1IPROC glUniform1i;
PFNGLGETPROGRAMIVPROC glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
void initGL()
{
glGenTransformFeedbacks = (PFNGLGENTRANSFORMFEEDBACKSPROC)IRR_OGL_LOAD_EXTENSION("glGenTransformFeedbacks");
glBindTransformFeedback = (PFNGLBINDTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glBindTransformFeedback");
glDrawTransformFeedback = (PFNGLDRAWTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glDrawTransformFeedback");
glBeginTransformFeedback = (PFNGLBEGINTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glBeginTransformFeedback");
glEndTransformFeedback = (PFNGLENDTRANSFORMFEEDBACKPROC)IRR_OGL_LOAD_EXTENSION("glEndTransformFeedback");
glBindBufferBase = (PFNGLBINDBUFFERBASEPROC)IRR_OGL_LOAD_EXTENSION("glBindBufferBase");
glGenBuffers = (PFNGLGENBUFFERSPROC)IRR_OGL_LOAD_EXTENSION("glGenBuffers");
glBindBuffer = (PFNGLBINDBUFFERPROC)IRR_OGL_LOAD_EXTENSION("glBindBuffer");
glBufferData = (PFNGLBUFFERDATAPROC)IRR_OGL_LOAD_EXTENSION("glBufferData");
glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)IRR_OGL_LOAD_EXTENSION("glVertexAttribPointer");
glCreateShader = (PFNGLCREATESHADERPROC)IRR_OGL_LOAD_EXTENSION("glCreateShader");
glCompileShader = (PFNGLCOMPILESHADERPROC)IRR_OGL_LOAD_EXTENSION("glCompileShader");
glShaderSource = (PFNGLSHADERSOURCEPROC)IRR_OGL_LOAD_EXTENSION("glShaderSource");
glCreateProgram = (PFNGLCREATEPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glCreateProgram");
glAttachShader = (PFNGLATTACHSHADERPROC)IRR_OGL_LOAD_EXTENSION("glAttachShader");
glLinkProgram = (PFNGLLINKPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glLinkProgram");
glUseProgram = (PFNGLUSEPROGRAMPROC)IRR_OGL_LOAD_EXTENSION("glUseProgram");
glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)IRR_OGL_LOAD_EXTENSION("glEnableVertexAttribArray");
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)IRR_OGL_LOAD_EXTENSION("glGetUniformLocation");
glUniformMatrix4fv = (PFNGLUNIFORMMATRIX4FVPROC)IRR_OGL_LOAD_EXTENSION("glUniformMatrix4fv");
glUniform1f = (PFNGLUNIFORM1FPROC)IRR_OGL_LOAD_EXTENSION("glUniform1f");
glUniform3f = (PFNGLUNIFORM3FPROC)IRR_OGL_LOAD_EXTENSION("glUniform3f");
glDisableVertexAttribArray = (PFNGLDISABLEVERTEXATTRIBARRAYPROC)IRR_OGL_LOAD_EXTENSION("glDisableVertexAttribArray");
glDeleteShader = (PFNGLDELETESHADERPROC)IRR_OGL_LOAD_EXTENSION("glDeleteShader");
glGetShaderiv = (PFNGLGETSHADERIVPROC)IRR_OGL_LOAD_EXTENSION("glGetShaderiv");
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)IRR_OGL_LOAD_EXTENSION("glGetShaderInfoLog");
#ifdef _IRR_WINDOWS_API_
glActiveTexture = (PFNGLACTIVETEXTUREPROC)IRR_OGL_LOAD_EXTENSION("glActiveTexture");
#endif
glUniform2f = (PFNGLUNIFORM2FPROC)IRR_OGL_LOAD_EXTENSION("glUniform2f");
glUniform1i = (PFNGLUNIFORM1IPROC)IRR_OGL_LOAD_EXTENSION("glUniform1i");
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)IRR_OGL_LOAD_EXTENSION("glGetProgramiv");
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)IRR_OGL_LOAD_EXTENSION("glGetProgramInfoLog");
glTransformFeedbackVaryings = (PFNGLTRANSFORMFEEDBACKVARYINGSPROC)IRR_OGL_LOAD_EXTENSION("glTransformFeedbackVaryings");
}
// Mostly from shader tutorial
GLuint LoadShader(const char * file, unsigned type) {
GLuint Id = glCreateShader(type);
std::string Code;
std::ifstream Stream(file, std::ios::in);
if (Stream.is_open())
{
std::string Line = "";
while (getline(Stream, Line))
Code += "\n" + Line;
Stream.close();
}
GLint Result = GL_FALSE;
int InfoLogLength;
printf("Compiling shader : %s\n", file);
char const * SourcePointer = Code.c_str();
int length = strlen(SourcePointer);
glShaderSource(Id, 1, &SourcePointer, &length);
glCompileShader(Id);
glGetShaderiv(Id, GL_COMPILE_STATUS, &Result);
if (Result == GL_FALSE) {
glGetShaderiv(Id, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetShaderInfoLog(Id, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
return Id;
}
GLuint LoadProgram(const char * vertex_file_path, const char * fragment_file_path){
GLuint VertexShaderID = LoadShader(vertex_file_path, GL_VERTEX_SHADER);
GLuint FragmentShaderID = LoadShader(fragment_file_path, GL_FRAGMENT_SHADER);
GLuint ProgramID = glCreateProgram();
glAttachShader(ProgramID, VertexShaderID);
glAttachShader(ProgramID, FragmentShaderID);
glLinkProgram(ProgramID);
GLint Result = GL_FALSE;
int InfoLogLength;
glGetProgramiv(ProgramID, GL_LINK_STATUS, &Result);
if (Result == GL_FALSE) {
glGetProgramiv(ProgramID, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetProgramInfoLog(ProgramID, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
glDeleteShader(VertexShaderID);
glDeleteShader(FragmentShaderID);
return ProgramID;
}
GLuint LoadTFBProgram(const char * vertex_file_path, const char **varyings, unsigned varyingscount){
GLuint Shader = LoadShader(vertex_file_path, GL_VERTEX_SHADER);
GLuint Program = glCreateProgram();
glAttachShader(Program, Shader);
glTransformFeedbackVaryings(Program, varyingscount, varyings, GL_INTERLEAVED_ATTRIBS);
glLinkProgram(Program);
GLint Result = GL_FALSE;
int InfoLogLength;
glGetProgramiv(Program, GL_LINK_STATUS, &Result);
if (Result == GL_FALSE) {
glGetProgramiv(Program, GL_INFO_LOG_LENGTH, &InfoLogLength);
char *ErrorMessage = new char[InfoLogLength];
glGetProgramInfoLog(Program, InfoLogLength, NULL, ErrorMessage);
printf(ErrorMessage);
delete[] ErrorMessage;
}
glDeleteShader(Shader);
return Program;
}
GLuint getTextureGLuint(ITexture *tex) { return static_cast<const COpenGLTexture*>(tex)->getOpenGLTextureName(); }
void bindUniformToTextureUnit(GLuint location, GLuint texid, unsigned textureUnit) {
glActiveTexture(GL_TEXTURE0 + textureUnit);
glBindTexture(GL_TEXTURE_2D, texid);
glUniform1i(location, textureUnit);
}
class GPUParticle {
private:
GLuint SimulationProgram, RenderProgram, tfb_vertex_buffer[2];
GLuint texture, normal_and_depth;
GLuint loc_campos, loc_viewm, loc_time;
GLuint loc_screenw, loc_screen, loc_invproj, texloc_tex, texloc_normal_and_depths;
unsigned count;
public:
GPUParticle(unsigned c, float *initialSamples, GLuint tex, GLuint rtt) :
count(c), texture(tex), normal_and_depth(rtt) {
initGL();
glGenBuffers(2, tfb_vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[0]);
glBufferData(GL_ARRAY_BUFFER, 3 * count * sizeof(float), initialSamples, GL_STREAM_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[1]);
glBufferData(GL_ARRAY_BUFFER, 3 * count * sizeof(float), 0, GL_STREAM_DRAW);
RenderProgram = LoadProgram(file_manager->getAsset("shaders/rain.vert").c_str(), file_manager->getAsset("shaders/rain.frag").c_str());
loc_screenw = glGetUniformLocation(RenderProgram, "screenw");
loc_screen = glGetUniformLocation(RenderProgram, "screen");
loc_invproj = glGetUniformLocation(RenderProgram, "invproj");
texloc_tex = glGetUniformLocation(RenderProgram, "tex");
texloc_normal_and_depths = glGetUniformLocation(RenderProgram, "normals_and_depth");
const char *varyings[] = {"currentPosition"};
SimulationProgram = LoadTFBProgram(file_manager->getAsset("shaders/rainsim.vert").c_str(), varyings, 1);
loc_campos = glGetUniformLocation(SimulationProgram, "campos");
loc_viewm = glGetUniformLocation(SimulationProgram, "viewm");
loc_time = glGetUniformLocation(SimulationProgram, "time");
}
void simulate() {
glUseProgram(SimulationProgram);
const float time = irr_driver->getDevice()->getTimer()->getTime() / 90.0f;
const matrix4 viewm = irr_driver->getVideoDriver()->getTransform(ETS_VIEW);
const vector3df campos = irr_driver->getSceneManager()->getActiveCamera()->getPosition();
glEnable(GL_RASTERIZER_DISCARD);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[0]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, tfb_vertex_buffer[1]);
glUniformMatrix4fv(loc_viewm, 1, GL_FALSE, viewm.pointer());
glUniform1f(loc_time, time);
glUniform3f(loc_campos, campos.X, campos.Y, campos.Z);
glBeginTransformFeedback(GL_POINTS);
glDrawArrays(GL_POINTS, 0, count);
glEndTransformFeedback();
glDisable(GL_RASTERIZER_DISCARD);
}
void render() {
const float screenw = (float)UserConfigParams::m_width;
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
glEnable(GL_POINT_SPRITE);
glUseProgram(RenderProgram);
glEnableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, tfb_vertex_buffer[1]);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
float screen[2] = { (float)UserConfigParams::m_width,
(float)UserConfigParams::m_height };
matrix4 invproj = irr_driver->getVideoDriver()->getTransform(ETS_PROJECTION);
invproj.makeInverse();
bindUniformToTextureUnit(texloc_tex, texture, 0);
bindUniformToTextureUnit(texloc_normal_and_depths, normal_and_depth, 1);
glUniformMatrix4fv(loc_invproj, 1, GL_FALSE, invproj.pointer());
glUniform2f(loc_screen, screen[0], screen[1]);
glUniform1f(loc_screenw, screenw);
glDrawArrays(GL_POINTS, 0, count);
glDisableVertexAttribArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glActiveTexture(GL_TEXTURE0);
glDisable(GL_VERTEX_PROGRAM_POINT_SIZE);
}
};
// END OPENGL PARTICLE SYSTEM
// The actual rain node
class RainNode: public scene::ISceneNode
{
private:
GPUParticle *gpupart;
// GPUParticle *gpupart;
public:
RainNode(scene::ISceneManager* mgr, ITexture *tex)
: scene::ISceneNode(0, mgr, -1)
@ -326,7 +72,7 @@ public:
vertices[3 * i + 1] = y;
vertices[3 * i + 2] = z;
}
gpupart = new GPUParticle(count, vertices, getTextureGLuint(mat.getTexture(0)), getTextureGLuint(irr_driver->getRTT(RTT_NORMAL_AND_DEPTH)));
//gpupart = new GPUParticle(count, vertices, getTextureGLuint(mat.getTexture(0)), getTextureGLuint(irr_driver->getRTT(RTT_NORMAL_AND_DEPTH)));
box.addInternalPoint(vector3df((float)(-area/2)));
box.addInternalPoint(vector3df((float)( area/2)));
@ -334,13 +80,13 @@ public:
~RainNode()
{
delete gpupart;
// delete gpupart;
}
virtual void render()
{
gpupart->simulate();
gpupart->render();
// gpupart->simulate();
// gpupart->render();
// We need to force irrlicht to update its internal states
IVideoDriver * const drv = irr_driver->getVideoDriver();
drv->setMaterial(mat);