void BulletSpheresApp::update()
{
// update time
// update bullet context
updateTime();
mContext->setGravity( vec3( 0 ) );
mContext->update();
// add attractive force
mat4 * matrices = (mat4*)mMatrices->map( GL_WRITE_ONLY );
for( auto &body : mRigidBodies ){
body.update( mTimeElapsed );
int index = body.getId();
if( index >=2 ){ // small orbs
for( int i=0; i<2; i++ ){
vec3 pos = mRigidBodies[i].getPos();
float size = mRigidBodies[i].getSize();
float strength = mRigidBodies[i].getStrength();
body.attract( pos, size, strength );
}
matrices[index-2] = body.getMatrix();
} else { // big orbs
float size = mRigidBodies[index].getSize();
body.attract( vec3( 0 ), size, 1.0f );
}
}
mMatrices->unmap();
}
void TessellationSampleApp::createIcosahedron()
{
const int faces[] = {
2, 1, 0,
3, 2, 0,
4, 3, 0,
5, 4, 0,
1, 5, 0,
11, 6, 7,
11, 7, 8,
11, 8, 9,
11, 9, 10,
11, 10, 6,
1, 2, 6,
2, 3, 7,
3, 4, 8,
4, 5, 9,
5, 1, 10,
2, 7, 6,
3, 8, 7,
4, 9, 8,
5, 10, 9,
1, 6, 10
};
const float verts[] = {
0.000f, 0.000f, 1.000f,
0.894f, 0.000f, 0.447f,
0.276f, 0.851f, 0.447f,
-0.724f, 0.526f, 0.447f,
-0.724f, -0.526f, 0.447f,
0.276f, -0.851f, 0.447f,
0.724f, 0.526f, -0.447f,
-0.276f, 0.851f, -0.447f,
-0.894f, 0.000f, -0.447f,
-0.276f, -0.851f, -0.447f,
0.724f, -0.526f, -0.447f,
0.000f, 0.000f, -1.000f
};
mIndexCount = sizeof(faces) / sizeof(faces[0]);
vertexArrayObject->bind();
// Create the VBO for positions:
GLsizei stride = 3 * sizeof(float);
vertexBufferObject->bind();
vertexBufferObject->bufferData(sizeof(verts), verts, GL_STATIC_DRAW);
gl::enableVertexAttribArray( (GLuint)mPositionIndex );
gl::vertexAttribPointer( (GLuint)mPositionIndex, 3, GL_FLOAT, GL_FALSE, stride, 0 );
// Create the VBO for indices:
indexBufferObject->bind();
indexBufferObject->bufferData( sizeof(faces), faces, GL_STATIC_DRAW );
}
void TransformFeedbackIntroApp::runTransformFeedback()
{
gl::ScopedVao scopeVao( mVao );
gl::ScopedGlslProg scopeGlsl( mGlsl );
gl::ScopedState scopeState( GL_RASTERIZER_DISCARD, true );
// Bind the capture vbo to the TransformVertex binding point to capture the calculations
gl::bindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, TransformIndex, mCaptureVbo );
// Begin Transform Feedback, using the primitive we plan to draw
gl::beginTransformFeedback( GL_POINTS );
gl::drawArrays( GL_POINTS, 0, NumVertices );
// End Transform Feedback
gl::endTransformFeedback();
glFlush();
// Fetch and print results
GLfloat feedback[NumVertices];
mCaptureVbo->getBufferSubData( 0, sizeof(float) * NumVertices, feedback );
console() << feedback[0] << " "
<< feedback[1] << " "
<< feedback[2] << " "
<< feedback[3] << " "
<< feedback[4] << std::endl;
}
void SinOrbitApp::reset(bool pShader)
{
mColor = vec4(randVec3(), randFloat(0.005f, 0.025f));
mAlpha = randFloat(0.01f, 0.1f);
auto w = randFloat(5.0f,10.0f);
auto maxR = randFloat(350.0f, 400.0f);
auto numPtcls = randInt(500, 1000);
mPtcls.clear();
for (int i = 0; i < numPtcls; ++i) {
mPtcls.push_back(
ptcl(
randFloat(0.2f, 0.8f),
randFloat(400.0f-w, 400.0f+w),
randFloat(0.01f, 0.05f),
randFloat(-0.5f, 0.5f),
randFloat(1.0f, 3.0f)
)
);
}
if (pShader) {
mPointShader = gl::GlslProg::create(loadAsset("points.vert"), loadAsset("points.frag"));
geom::BufferLayout attribs;
attribs.append(geom::POSITION, 2, sizeof(ptcl), offsetof(ptcl, Pos), 0);
mPointData = gl::Vbo::create(GL_ARRAY_BUFFER, mPtcls, GL_DYNAMIC_DRAW);
mPointMesh = gl::VboMesh::create(mPtcls.size(), GL_POINTS, { {attribs, mPointData} });
}
else {
mPointData->bufferData(mPtcls.size()*sizeof(ptcl), mPtcls.data(), GL_DYNAMIC_DRAW);
}
}
void PointCloudVAO::updateCloud()
{
mDS->update();
auto depth = mDS->getDepthFrame();
auto iter = depth->getIter();
mPoints.clear();
while (iter.line())
{
while (iter.pixel())
{
if (iter.x() % mParamStep == 0 && iter.y() % mParamStep == 0)
{
float x = (float)iter.x();
float y = (float)iter.y();
float z = (float)iter.v();
if (z > mParamDepthMin && z < mParamDepthMax)
{
auto world = mDS->getDepthSpacePoint(vec3(x, y, z));
auto diffuse = mDS->getColorFromDepthSpace(world);
mPoints.push_back(Pt(world, diffuse));
}
}
}
}
mVbo->bufferData(mPoints.size()*sizeof(Pt), mPoints.data(), GL_DYNAMIC_DRAW);
}
void PointCloudApp::update()
{
mCinderRS->update();
mPoints.clear();
Channel16u cChanDepth = mCinderRS->getDepthFrame();
mTexRgb->update(mCinderRS->getRgbFrame());
for (int dy = 0; dy < mDepthDims.y; ++dy)
{
for (int dx = 0; dx < mDepthDims.x; ++dx)
{
float cDepth = (float)*cChanDepth.getData(dx, dy);
if (cDepth > 100 && cDepth < 1000)
{
vec3 cPos = mCinderRS->getDepthSpacePoint(vec3(dx, dy, cDepth));
vec2 cUV = mCinderRS->getColorCoordsFromDepthImage(static_cast<float>(dx),
static_cast<float>(dy),
cDepth);
mPoints.push_back(CloudPoint(cPos, cUV));
}
}
}
mBufferObj->bufferData(mPoints.size()*sizeof(CloudPoint), mPoints.data(), GL_DYNAMIC_DRAW);
mMeshObj = gl::VboMesh::create(mPoints.size(), GL_POINTS, { { mAttribObj, mBufferObj } });
mDrawObj->replaceVboMesh(mMeshObj);
}
void InstancedTeapotsApp::update()
{
// move the camera up and down on Y
mCam.lookAt( vec3( 0, CAMERA_Y_RANGE.first + abs(sin( getElapsedSeconds() / 4)) * (CAMERA_Y_RANGE.second - CAMERA_Y_RANGE.first), 0 ), vec3( 0 ) );
// update our instance positions; map our instance data VBO, write new positions, unmap
vec3 *positions = (vec3*)mInstanceDataVbo->mapWriteOnly( true );
for( size_t potX = 0; potX < NUM_INSTANCES_X; ++potX ) {
for( size_t potY = 0; potY < NUM_INSTANCES_Y; ++potY ) {
float instanceX = potX / (float)NUM_INSTANCES_X - 0.5f;
float instanceY = potY / (float)NUM_INSTANCES_Y - 0.5f;
// just some nonsense math to move the teapots in a wave
vec3 newPos( instanceX * vec3( DRAW_SCALE, 0, 0 ) +
instanceY * vec3( 0, 0, DRAW_SCALE ) +
vec3( 0, 30, 0 ) * sinf( getElapsedSeconds() * 3 + instanceX * 3 + instanceY * 3 ) );
*positions++ = newPos;
}
}
mInstanceDataVbo->unmap();
}
void SinOrbitApp::update()
{
if (mStarted) {
if (getElapsedFrames() % 300 == 0) {
reset(false);
}
for (auto &p : mPtcls) {
p.step();
}
mPointData->bufferData(mPtcls.size()*sizeof(ptcl), mPtcls.data(), GL_DYNAMIC_DRAW);
}
}
void SpiderWebApp::reset()
{
mIterationIndex = 0;
mPositionBufTexs[0].reset();
mPositionBufTexs[1].reset();
mPositionBufTexs[0] = nullptr;
mPositionBufTexs[1] = nullptr;
mVaos[0].reset();
mVaos[1].reset();
mVaos[0] = nullptr;
mVaos[1] = nullptr;
// mPositions[0] = nullptr; // with these, we only get movement the first time around
// mPositions[1] = nullptr;
// mVelocities[0] = nullptr;
// mVelocities[1] = nullptr;
// mConnections[0] = nullptr;
// mConnections[1] = nullptr;
// mConnectionLen[0] = nullptr;
// mConnectionLen[1] = nullptr;
// mLineIndices = nullptr;
// adding this gives us 3 rounds of movement
mPositions[0]->mapReplace();
mPositions[1]->mapReplace();
mVelocities[0]->mapReplace();
mVelocities[1]->mapReplace();
mConnections[0]->mapReplace();
mConnections[1]->mapReplace();
mConnectionLen[0]->mapReplace();
mConnectionLen[1]->mapReplace();
mLineIndices->mapReplace();
// RESET and generate web
mWeb->reset();
mWeb = nullptr;
generateWeb();
setupBuffers();
}
void RandomSpawn::updateParticles()
{
mCinderDS->update();
mChanDepth = mCinderDS->getDepthFrame();
//Channel16u::Iter cIter = mChanDepth.getIter();
for (int sp = 0; sp < S_SPAWN_COUNT; ++sp)
{
if (mPointsParticles.size() < S_MAX_COUNT)
{
int cX = randInt(0, mDepthDims.x);
int cY = randInt(0, mDepthDims.y);
float cZ = (float)mChanDepth.getValue(ivec2(cX, cY));
if (cZ > S_MIN_Z&&cZ < S_MAX_Z)
{
vec3 cWorld = mCinderDS->getDepthSpacePoint(static_cast<float>(mDepthDims.x-cX),
static_cast<float>(cY),
static_cast<float>(cZ));
// pos, acc size life
vec3 cAcc(randFloat(-5.f, 5.f), randFloat(0.5f, 3.5f), randFloat(-5.f, 5.f));
float cSize = randFloat(S_POINT_SIZE*0.25f, S_POINT_SIZE);
int cLife = randInt(60, 120);
ColorA cColor = ColorA(randFloat(), 0.1f, randFloat(), 1.0f);
mPointsParticles.push_back(CloudParticle(cWorld, cSize, cLife, cColor));
}
}
}
//now update particles
for (auto pit = mPointsParticles.begin(); pit != mPointsParticles.end();)
{
if (pit->PAge == 0)
pit = mPointsParticles.erase(pit);
else
{
pit->step(mPerlin);
++pit;
}
}
mDataInstance_P->bufferData(mPointsParticles.size()*sizeof(CloudParticle), mPointsParticles.data(), GL_DYNAMIC_DRAW);
}
void Choreo3DApp::update()
{
setFrameRate(frameRate);
//DISABLE CAMERA INTERACTION IF MOUSE IS OVER UI REGION
if (getMousePos().x > 3 * getWindowWidth()/4. && camActive)
{
camActive = false;
mCamUi.disconnect();
mCamUi.disable();
cout << "disabling camera UI" << endl;
} else {
if (!camActive)
{
mCamUi.connect(getWindow());
mCamUi.enable();
}
camActive = true;
cout << "enabling camera UI" << endl;
}
mGlsl->uniform("uColor", markerColour );
if (!paused)
{
//UPDATE POSITIONS
//MAP INSTANCE DATA TO VBO
//WRITE NEW POSITIONS
//UNMAP
glm::vec3 *newPositions = (glm::vec3*)mInstanceDataVbo->mapReplace();
for( int i = 0; i < jointList.size(); ++i )
{
float instanceX = jointList[i].jointPositions[FRAME_COUNT].x;
float instanceY = jointList[i].jointPositions[FRAME_COUNT].y;
float instanceZ = jointList[i].jointPositions[FRAME_COUNT].z;
vec3 newPos(vec3(instanceX,instanceY, instanceZ)); //CREATE A NEW VEC3 FOR UPDATING THE VBO
framePositions[i] = newPos;
}
//REPLACE VEC3s IN VBO BY INCREMENTING THE POINTER
for (int i = 0; i < framePositions.size(); i++){
*newPositions++ = framePositions[i];
}
handTrail.update(framePositions[26], dancerColor);
// std::cout << framePositions[17] << std::endl;
skeleton.update(framePositions);
mInstanceDataVbo->unmap();
// std::cout << "position: " << positions[0] << std::endl;
if (ribbonsActive)updateRibbons();
//MANUALLY INCREMENT THE FRAME, IF THE FRAME_COUNT EXCEEDS TOTAL FRAMES, RESET THE COUNTER
if (FRAME_COUNT < TOTAL_FRAMES)
{
FRAME_COUNT += 1;
} else {
FRAME_COUNT = 0;
}
//std::cout << getAverageFps() << std:: endl;
// std::cout << "frame rate: " << getAverageFps() << ", frame count: " << FRAME_COUNT << std::endl;
//define changed color
// Color temp = Color(dancerColor[0],dancerColor[1],dancerColor[2]);
mCurrentFrame++; //MANUALLY ADVANCE THE CURRENT FRAME - WITH RESPECT TO THE DANCERS
}
updateGui();
}
void SpiderWebApp::setupBuffers()
{
// get all of the points from the spider web
// buffer the positions
std::array<vec4, MAX_POINTS> positions;
std::array<vec3, MAX_POINTS> velocities;
std::array<ivec4, MAX_POINTS> connections;
std::array<vec4, MAX_POINTS> connectionLen;
std::array<vec4, MAX_POINTS> colors;
vector<ParticleRef> webPoints = mWeb->getPoints();
int n = 0;
Perlin p = Perlin();
for( auto iter = webPoints.begin(); iter != webPoints.end(); ++iter ) {
auto point = (*iter);
vec2 pos = point->getPosition();
// create our initial positions
positions[point->getId()] = vec4(
pos.x, pos.y,
0.0,
1.0f );
// zero out velocities
velocities[point->getId()] = vec3( 0.0f );
connections[n] = ivec4( -1 );
connectionLen[n] = vec4( 0.0 );
auto conn = point->getNeighbors();
// use first 4 connections of there are more
int max = min(int(conn.size()), 4);
for( int i = 0; i < max; ++i ){
auto connection = conn[i];
connections[n][i] = connection->getId();
// connectionLen[n][i] = distance( normalize(pos), normalize(connection->getPosition()) );
connectionLen[n][i] = distance( pos, connection->getPosition() );
}
n++;
// DEFINE alpha - helps make the line thickness look a bit varied
float x = pos.x / getWindowWidth();
float y = pos.y / getWindowHeight();
float a = p.fBm( x, y ) * 2.0;
a += 0.35;
colors[point->getId()] = vec4( vec3( 1.0 ), a );
}
for ( int i = 0; i < 2; i++ ) {
mVaos[i] = gl::Vao::create();
gl::ScopedVao scopeVao( mVaos[i] );
{
// buffer the positions
mPositions[i] = gl::Vbo::create( GL_ARRAY_BUFFER, positions.size() * sizeof(vec4), positions.data(), GL_STATIC_DRAW );
{
// bind and explain the vbo to your vao so that it knows how to distribute vertices to your shaders.
gl::ScopedBuffer sccopeBuffer( mPositions[i] );
gl::vertexAttribPointer( POSITION_INDEX, 4, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) 0 );
gl::enableVertexAttribArray( POSITION_INDEX );
}
// buffer the velocities
mVelocities[i] = gl::Vbo::create( GL_ARRAY_BUFFER, velocities.size() * sizeof(vec3), velocities.data(), GL_STATIC_DRAW );
{
// bind and explain the vbo to your vao so that it knows how to distribute vertices to your shaders.
gl::ScopedBuffer scopeBuffer( mVelocities[i] );
gl::vertexAttribPointer( VELOCITY_INDEX, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) 0 );
gl::enableVertexAttribArray( VELOCITY_INDEX );
}
// buffer the connections
mConnections[i] = gl::Vbo::create( GL_ARRAY_BUFFER, connections.size() * sizeof(ivec4), connections.data(), GL_STATIC_DRAW );
{
// bind and explain the vbo to your vao so that it knows how to distribute vertices to your shaders.
gl::ScopedBuffer scopeBuffer( mConnections[i] );
gl::vertexAttribIPointer( CONNECTION_INDEX, 4, GL_INT, 0, (const GLvoid*) 0 );
gl::enableVertexAttribArray( CONNECTION_INDEX );
}
// buffer the connection lengths
mConnectionLen[i] = gl::Vbo::create( GL_ARRAY_BUFFER, connectionLen.size() * sizeof(vec4), connectionLen.data(), GL_STATIC_DRAW );
{
// bind and explain the vbo to your vao so that it knows how to distribute vertices to your shaders.
gl::ScopedBuffer scopeBuffer( mConnectionLen[i] );
gl::vertexAttribPointer( CONNECTION_LEN_INDEX, 4, GL_FLOAT, GL_FLOAT, 0, (const GLvoid*) 0 );
gl::enableVertexAttribArray( CONNECTION_LEN_INDEX );
}
// buffer the colors
mColors[i] = gl::Vbo::create( GL_ARRAY_BUFFER, colors.size() * sizeof(vec4), colors.data(), GL_STATIC_DRAW );
{
// bind and explain the vbo to your vao so that it knows how to distribute vertices to your shaders.
gl::ScopedBuffer scopeBuffer( mColors[i] );
gl::vertexAttribPointer( COLOR_INDEX, 4, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) 0 );
gl::enableVertexAttribArray( COLOR_INDEX );
}
// Create a TransformFeedbackObj, which is similar to Vao
// It's used to capture the output of a glsl and uses the
// index of the feedback's varying variable names.
mFeedbackObj[i] = gl::TransformFeedbackObj::create();
// Bind the TransformFeedbackObj and bind each corresponding buffer
// to it's index.
mFeedbackObj[i]->bind();
gl::bindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, POSITION_INDEX, mPositions[i] );
gl::bindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, VELOCITY_INDEX, mVelocities[i] );
mFeedbackObj[i]->unbind();
}
}
// create your two BufferTextures that correspond to your position buffers.
mPositionBufTexs[0] = gl::BufferTexture::create( mPositions[0], GL_RGBA32F );
mPositionBufTexs[1] = gl::BufferTexture::create( mPositions[1], GL_RGBA32F );
auto strands = mWeb->getUniqueStrands();
int lines = strands.size();
mConnectionCount = lines;
// create the indices to draw links between the cloth points
mLineIndices = gl::Vbo::create( GL_ELEMENT_ARRAY_BUFFER, lines * 2 * sizeof(int), nullptr, GL_STATIC_DRAW );
auto e = (int *) mLineIndices->mapReplace();
for( auto iter = strands.begin(); iter != strands.end(); ++iter ){
auto strand = *iter;
*e++ = strand.first->getId();
*e++ = strand.second->getId();
}
mLineIndices->unmap();
}
void TransformFeedbackClothSimulationApp::loadBuffers()
{
int n = 0;
array<vec4, POINTS_TOTAL> positions;
array<vec3, POINTS_TOTAL> velocities;
array<ivec4, POINTS_TOTAL> connections;
// We set all connections to -1, because these will only be updated
// if there are connection indices. Explanation below.
connections.fill( ivec4( -1 ) );
for( int j = 0; j < POINTS_Y; j++ ) {
float fj = (float)j / (float)POINTS_Y;
for( int i = 0; i < POINTS_X; i++ ) {
float fi = (float)i / (float)POINTS_X;
// This fills the position buffer data, basically makes a grid
positions[n] = vec4((fi - 0.5f) * (float)POINTS_X, // x coordinate
(fj - 0.5f) * (float)POINTS_Y, // y coordinate
0.6f * sinf(fi) * cosf(fj), // z coordinate
1.0f); // homogenous coordinate or w
// This allows us to figure out the indices of the four points
// surrounding the current point. This will be used to index
// into the texture buffer.
if( j != (POINTS_Y - 1) ) { // if it's not one of the top row, don't move
if( i != 0 )
connections[n][0] = n - 1;
if( j != 0 )
connections[n][1] = n - POINTS_X;
if( i != (POINTS_X - 1) )
connections[n][2] = n + 1;
if( j != (POINTS_Y - 1) )
connections[n][3] = n + POINTS_X;
}
n++;
}
}
// Create the Position Buffer with the intial position data
mPositions[0] = gl::Vbo::create( GL_ARRAY_BUFFER, positions.size() * sizeof(vec4), positions.data(), GL_STATIC_DRAW );
// Create another Position Buffer that is null, for ping-ponging
mPositions[1] = gl::Vbo::create( GL_ARRAY_BUFFER, positions.size() * sizeof(vec4), nullptr, GL_STATIC_DRAW );
// Create the Velocity Buffer with the intial velocity data
mVelocities[0] = gl::Vbo::create( GL_ARRAY_BUFFER, velocities.size() * sizeof(vec3), velocities.data(), GL_STATIC_DRAW );
// Create another Velocity Buffer that is null, for ping-ponging
mVelocities[1] = gl::Vbo::create( GL_ARRAY_BUFFER, velocities.size() * sizeof(vec3), nullptr, GL_STATIC_DRAW );
// Create Connection Buffer to index into the Texture Buffer
mConnections = gl::Vbo::create( GL_ARRAY_BUFFER, connections.size() * sizeof(ivec4), connections.data(), GL_STATIC_DRAW );
for( int i = 0; i < 2; i++ ) {
// Initialize the Vao's holding the info for each buffer
mVaos[i] = gl::Vao::create();
// Bind the vao to capture index data for the glsl
mVaos[i]->bind();
mPositions[i]->bind();
gl::vertexAttribPointer( POSITION_INDEX, 4, GL_FLOAT, GL_FALSE, 0, NULL );
gl::enableVertexAttribArray( POSITION_INDEX );
mVelocities[i]->bind();
gl::vertexAttribPointer( VELOCITY_INDEX, 3, GL_FLOAT, GL_FALSE, 0, NULL );
gl::enableVertexAttribArray( VELOCITY_INDEX );
mConnections->bind();
gl::vertexAttribIPointer( CONNECTION_INDEX, 4, GL_INT, 0, NULL );
gl::enableVertexAttribArray( CONNECTION_INDEX );
// Create a TransformFeedbackObj, which is similar to Vao
// It's used to capture the output of a glsl and uses the
// index of the feedback's varying variable names.
mFeedbackObjs[i] = gl::TransformFeedbackObj::create();
// Bind the TransformFeedbackObj and bind each corresponding buffer
// to it's index.
mFeedbackObjs[i]->bind();
gl::bindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, POSITION_INDEX, mPositions[i] );
gl::bindBufferBase( GL_TRANSFORM_FEEDBACK_BUFFER, VELOCITY_INDEX, mVelocities[i] );
mFeedbackObjs[i]->unbind();
// Create Texture buffers to gain access to the lookup tables for
// calculations in the update shader
mPosBufferTextures[i] = gl::BufferTexture::create( mPositions[i], GL_RGBA32F );
}
// Create an element buffer to draw the lines (connections) between the points
array<uint32_t, CONNECTIONS_TOTAL*2> lineIndices;
uint32_t * e = lineIndices.data();
for( int j = 0; j < POINTS_Y; j++ ) {
for( int i = 0; i < POINTS_X - 1; i++ ) {
*e++ = i + j * POINTS_X;
*e++ = 1 + i + j * POINTS_Y;
}
}
for( int i = 0; i < POINTS_X; i++ ) {
for( int j = 0; j < POINTS_Y - 1; j++ ) {
*e++ = i + j * POINTS_X;
*e++ = POINTS_X + i + j * POINTS_X;
}
}
mLineIndices = lineIndices.size();
mLineElementBuffer = gl::Vbo::create( GL_ELEMENT_ARRAY_BUFFER, lineIndices.size() * sizeof(uint32_t), lineIndices.data(), GL_STATIC_DRAW );
}
