void gpuPSApp::setupTextures(){
// Position 2D texture array
mInitPos = Surface32f( SIDE, SIDE, true);
Surface32f::Iter pixelIter = mInitPos.getIter();
while( pixelIter.line() ) {
while( pixelIter.pixel() ) {
/* Initial particle positions are passed in as R,G,B
float values. Alpha is used as particle mass. */
mInitPos.setPixel( pixelIter.getPos(), ColorAf( Rand::randFloat()-0.5f, Rand::randFloat()-0.5f, Rand::randFloat()-0.5f, Rand::randFloat(0.2f, 1.0f) ) );
}
}
gl::Texture::Format tFormat;
tFormat.setInternalFormat(GL_RGBA32F_ARB);
mPositions = gl::Texture( mInitPos, tFormat);
mPositions.setWrap( GL_REPEAT, GL_REPEAT );
mPositions.setMinFilter( GL_NEAREST );
mPositions.setMagFilter( GL_NEAREST );
//Velocity 2D texture array
mInitVel = Surface32f( SIDE, SIDE, true);
pixelIter = mInitVel.getIter();
while( pixelIter.line() ) {
while( pixelIter.pixel() ) {
/* Initial particle velocities are
passed in as R,G,B float values. */
mInitVel.setPixel( pixelIter.getPos(), ColorAf( 0.0f, 0.0f, 0.0f, 1.0f ) );
}
}
mVelocities = gl::Texture( mInitVel, tFormat);
mVelocities.setWrap( GL_REPEAT, GL_REPEAT );
mVelocities.setMinFilter( GL_NEAREST );
mVelocities.setMagFilter( GL_NEAREST );
}
void RDiffusionApp::setup()
{
mReactionU = 0.25f;
mReactionV = 0.04f;
mReactionK = 0.047f;
mReactionF = 0.1f;
mMousePressed = false;
// Setup the parameters
mParams = params::InterfaceGl( "Parameters", Vec2i( 175, 100 ) );
mParams.addParam( "Reaction u", &mReactionU, "min=0.0 max=0.4 step=0.01 keyIncr=u keyDecr=U" );
mParams.addParam( "Reaction v", &mReactionV, "min=0.0 max=0.4 step=0.01 keyIncr=v keyDecr=V" );
mParams.addParam( "Reaction k", &mReactionK, "min=0.0 max=1.0 step=0.001 keyIncr=k keyDecr=K" );
mParams.addParam( "Reaction f", &mReactionF, "min=0.0 max=1.0 step=0.001 keyIncr=f keyDecr=F" );
gl::Fbo::Format format;
format.enableDepthBuffer( false );
mCurrentFBO = 0;
mOtherFBO = 1;
mFBOs[0] = gl::Fbo( FBO_WIDTH, FBO_HEIGHT, format );
mFBOs[1] = gl::Fbo( FBO_WIDTH, FBO_HEIGHT, format );
mShader = gl::GlslProg( loadResource( RES_PASS_THRU_VERT ), loadResource( RES_GSRD_FRAG ) );
mTexture = gl::Texture( loadImage( loadResource( RES_STARTER_IMAGE ) ) );
mTexture.setWrap( GL_REPEAT, GL_REPEAT );
mTexture.setMinFilter( GL_LINEAR );
mTexture.setMagFilter( GL_LINEAR );
mTexture.bind( 1 );
resetFBOs();
}
void MemExploreApp::draw()
{
mTexture = gl::Texture(mDataPointer, GL_RGBA, mVolumeDim * mTilesDim, mVolumeDim * mTilesDim);
mTexture.setWrap(GL_REPEAT, GL_REPEAT);
mTexture.setMinFilter(GL_NEAREST);
mTexture.setMagFilter(GL_NEAREST);
float frustum[6];
mCamera.getFrustum(&frustum[0], &frustum[1], &frustum[2], &frustum[3], &frustum[4], &frustum[5]);
mFbo.bindFramebuffer();
gl::setMatricesWindow(mFbo.getSize(), false);
mProgram.bind();
mProgram.uniform("uTexture", 0);
mProgram.uniform("uVolumeDim", mVolumeDim);
mProgram.uniform("uTilesDim", mTilesDim);
mProgram.uniform("uTime", (float)getElapsedSeconds());
mProgram.uniform("uEyePoint", mCamera.getEyePoint());
mProgram.uniform("uXAxis", mCamera.getOrientation() * Vec3f::xAxis());
mProgram.uniform("uYAxis", mCamera.getOrientation() * Vec3f::yAxis());
mProgram.uniform("uViewDistance", mCamera.getAspectRatio() / abs(frustum[2] - frustum[0]) * mCamera.getNearClip());
mProgram.uniform("uNegViewDir", -mCamera.getViewDirection().normalized());
mProgram.uniform("uAspectRatio", mCamera.getAspectRatio());
mTexture.enableAndBind();
gl::drawSolidRect(mFbo.getBounds());
mTexture.unbind();
mProgram.unbind();
mFbo.unbindFramebuffer();
gl::setMatricesWindow(getWindowSize());
gl::draw(mFbo.getTexture(), getWindowBounds());
}
void shaderExternalFileExampleApp::update(){
if( mCapture && mCapture.checkNewFrame() ) {
mTexture = gl::Texture( mCapture.getSurface() );
mTexture.setWrap(GL_CLAMP, GL_CLAMP);
mTexture.setMinFilter(GL_NEAREST);
mTexture.setMagFilter(GL_NEAREST);
}
}
void VboSampleApp::setup()
{
mCamera.setAspectRatio(getWindowAspectRatio());
mTexture = bluegin::getTextureAsset("cinder_logo.png");
mTexture.setMinFilter(GL_LINEAR);
mTexture.setMagFilter(GL_LINEAR);
gl::VboMesh::Layout layout;
layout.setStaticIndices();
layout.setStaticPositions();
layout.setStaticTexCoords2d();
const int vertexCount = 4;
const int indexCount = 6;
mVboMesh = gl::VboMesh( vertexCount, indexCount, layout, GL_TRIANGLES );
vector<Vec3f> positions;
positions.push_back(Vec3f(-1.0f, 1.0f, 0));
positions.push_back(Vec3f(-1.0f, -1.0f, 0));
positions.push_back(Vec3f(1.0f, -1.0f, 0));
positions.push_back(Vec3f(1.0f, 1.0f, 0));
mVboMesh.bufferPositions(positions);
vector<Vec2f> texcoords;
texcoords.push_back(Vec2f(0, 0));
texcoords.push_back(Vec2f(0, 1.0f));
texcoords.push_back(Vec2f(1.0f, 1.0f));
texcoords.push_back(Vec2f(1.0f, 0));
mVboMesh.bufferTexCoords2d(0, texcoords);
vector<index_t> indices;
indices.push_back(index_t(0));
indices.push_back(index_t(1));
indices.push_back(index_t(2));
indices.push_back(index_t(2));
indices.push_back(index_t(3));
indices.push_back(index_t(0));
mVboMesh.bufferIndices(indices);
}
void millionParticlesApp::setup()
{
gl::clear();
try {
mPosShader = gl::GlslProg(ci::app::loadResource(POS_VS),ci::app::loadResource(POS_FS));
mVelShader = gl::GlslProg(ci::app::loadResource(VEL_VS),ci::app::loadResource(VEL_FS));
}
catch( gl::GlslProgCompileExc &exc ) {
std::cout << "Shader compile error: " << std::endl;
std::cout << exc.what();
}
catch( ... ) {
std::cout << "Unable to load shader" << std::endl;
}
//controls
mDrawTextures = false;
mIsFullScreen = false;
mFrameCounter = 0;
mPerlin = Perlin(32,clock() * .1f);
//initialize buffer
Surface32f mPosSurface = Surface32f(PARTICLES,PARTICLES,true);
Surface32f mVelSurface = Surface32f(PARTICLES,PARTICLES,true);
Surface32f mInfoSurface = Surface32f(PARTICLES,PARTICLES,true);
Surface32f mNoiseSurface = Surface32f(PARTICLES,PARTICLES,true);
Surface32f::Iter iterator = mPosSurface.getIter();
while(iterator.line())
{
while(iterator.pixel())
{
mVertPos = Vec3f(Rand::randFloat(getWindowWidth()) / (float)getWindowWidth(),
Rand::randFloat(getWindowHeight()) / (float)getWindowHeight(),0.0f);
//velocity
Vec2f vel = Vec2f(Rand::randFloat(-.005f,.005f),Rand::randFloat(-.005f,.005f));
float nX = iterator.x() * 0.005f;
float nY = iterator.y() * 0.005f;
float nZ = app::getElapsedSeconds() * 0.1f;
Vec3f v( nX, nY, nZ );
float noise = mPerlin.fBm( v );
float angle = noise * 15.0f ;
//vel = Vec3f( cos( angle ) * 6.28f, cos( angle ) * 6.28f, 0.0f );
//noise
mNoiseSurface.setPixel(iterator.getPos(),
Color( cos( angle ) * Rand::randFloat(.00005f,.0002f), sin( angle ) * Rand::randFloat(.00005f,.0002f), 0.0f ));
//position + mass
mPosSurface.setPixel(iterator.getPos(),
ColorA(mVertPos.x,mVertPos.y,mVertPos.z,
Rand::randFloat(.00005f,.0002f)));
//forces + decay
mVelSurface.setPixel(iterator.getPos(), Color(vel.x,vel.y, Rand::randFloat(.01f,1.00f)));
//particle age
mInfoSurface.setPixel(iterator.getPos(),
ColorA(Rand::randFloat(.007f,1.0f), 1.0f,0.00f,1.00f));
}
}
//gl texture settings
gl::Texture::Format tFormat;
tFormat.setInternalFormat(GL_RGBA16F_ARB);
gl::Texture::Format tFormatSmall;
tFormat.setInternalFormat(GL_RGBA8);
mSpriteTex = gl::Texture( loadImage( loadResource( "point.png" ) ), tFormatSmall);
mNoiseTex = gl::Texture(mNoiseSurface, tFormatSmall);
mNoiseTex.setWrap( GL_REPEAT, GL_REPEAT );
mNoiseTex.setMinFilter( GL_NEAREST );
mNoiseTex.setMagFilter( GL_NEAREST );
mPosTex = gl::Texture(mPosSurface, tFormat);
mPosTex.setWrap( GL_REPEAT, GL_REPEAT );
mPosTex.setMinFilter( GL_NEAREST );
mPosTex.setMagFilter( GL_NEAREST );
mVelTex = gl::Texture(mVelSurface, tFormat);
mVelTex.setWrap( GL_REPEAT, GL_REPEAT );
mVelTex.setMinFilter( GL_NEAREST );
mVelTex.setMagFilter( GL_NEAREST );
mInfoTex = gl::Texture(mInfoSurface, tFormatSmall);
mInfoTex.setWrap( GL_REPEAT, GL_REPEAT );
mInfoTex.setMinFilter( GL_NEAREST );
mInfoTex.setMagFilter( GL_NEAREST );
//initialize fbo
gl::Fbo::Format format;
format.enableDepthBuffer(false);
format.enableColorBuffer(true, 3);
format.setMinFilter( GL_NEAREST );
format.setMagFilter( GL_NEAREST );
format.setWrap(GL_CLAMP,GL_CLAMP);
format.setColorInternalFormat( GL_RGBA16F_ARB );
mFbo[0] = gl::Fbo(PARTICLES,PARTICLES, format);
mFbo[1] = gl::Fbo(PARTICLES,PARTICLES, format);
initFBO();
//fill dummy fbo
vector<Vec2f> texCoords;
vector<Vec3f> vertCoords, normCoords;
vector<uint32_t> indices;
gl::VboMesh::Layout layout;
layout.setStaticIndices();
layout.setStaticPositions();
layout.setStaticTexCoords2d();
layout.setStaticNormals();
mVbo = gl::VboMesh(PARTICLES*PARTICLES,PARTICLES*PARTICLES,layout,GL_POINTS);
for (int x = 0; x < PARTICLES; ++x) {
for (int y = 0; y < PARTICLES; ++y) {
indices.push_back( x * PARTICLES + y);
texCoords.push_back( Vec2f( x/(float)PARTICLES, y/(float)PARTICLES));
}
}
mVbo.bufferIndices(indices);
mVbo.bufferTexCoords2d(0, texCoords);
}