void HexagonMirrorApp::draw()
{
// clear the window
gl::clear();
// activate our camera
gl::pushMatrices();
gl::setMatrices( mCamera.getCamera() );
// set render states
gl::enable( GL_CULL_FACE );
gl::enableDepthRead();
gl::enableDepthWrite();
gl::color( Color::white() );
if( mVboMesh && mShaderInstanced && mBuffer )
{
// bind webcam image
if( mWebcamTexture )
mWebcamTexture.bind(0);
// bind the shader, which will do all the hard work for us
mShaderInstanced.bind();
mShaderInstanced.uniform( "texture", 0 );
mShaderInstanced.uniform( "scale", Vec2f( 1.0f / (3.0f * INSTANCES_PER_ROW), 1.0f / (3.0f * INSTANCES_PER_ROW) ) );
// bind the buffer containing the model matrix for each instance,
// this will allow us to pass this information as a vertex shader attribute.
// See: initializeBuffer()
glBindVertexArray(mVAO);
// we do all positioning in the shader, and therefor we only need
// a single draw call to render all instances.
drawInstanced( mVboMesh, NUM_INSTANCES );
// make sure our VBO is no longer bound
mVboMesh.unbindBuffers();
// unbind vertex array object containing our buffer
glBindVertexArray(0);
// unbind shader
mShaderInstanced.unbind();
if( mWebcamTexture )
mWebcamTexture.unbind();
}
// reset render states
gl::disableDepthWrite();
gl::disableDepthRead();
gl::disable( GL_CULL_FACE );
// restore 2D drawing
gl::popMatrices();
}
void RepulsionApp::createSphere( gl::VboMesh &vbo, int res )
{
float X = 0.525731112119f;
float Z = 0.850650808352f;
static Vec3f verts[12] = {
Vec3f( -X, 0.0f, Z ), Vec3f( X, 0.0f, Z ), Vec3f( -X, 0.0f, -Z ), Vec3f( X, 0.0f, -Z ),
Vec3f( 0.0f, Z, X ), Vec3f( 0.0f, Z, -X ), Vec3f( 0.0f, -Z, X ), Vec3f( 0.0f, -Z, -X ),
Vec3f( Z, X, 0.0f ), Vec3f( -Z, X, 0.0f ), Vec3f( Z, -X, 0.0f ), Vec3f( -Z, -X, 0.0f ) };
static GLuint triIndices[20][3] = {
{0,4,1}, {0,9,4}, {9,5,4}, {4,5,8}, {4,8,1}, {8,10,1}, {8,3,10}, {5,3,8}, {5,2,3}, {2,7,3},
{7,10,3}, {7,6,10}, {7,11,6}, {11,0,6}, {0,1,6}, {6,1,10}, {9,0,11}, {9,11,2}, {9,2,5}, {7,2,11} };
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticNormals();
layout.setStaticColorsRGB();
mPosCoords.clear();
mNormals.clear();
mColors.clear();
float invWidth = 1.0f/(float)FBO_WIDTH;
float invHeight = 1.0f/(float)FBO_HEIGHT;
for( int x = 0; x < FBO_WIDTH; ++x ) {
for( int y = 0; y < FBO_HEIGHT; ++y ) {
float u = ( (float)x + 0.5f ) * invWidth;
float v = ( (float)y + 0.5f ) * invHeight;
Colorf c = Colorf( u, v, 0.0f );
for( int i=0; i<20; i++ ){
drawSphereTri( verts[triIndices[i][0]], verts[triIndices[i][1]], verts[triIndices[i][2]], res, c );
}
}
}
vbo = gl::VboMesh( mPosCoords.size(), 0, layout, GL_TRIANGLES );
vbo.bufferPositions( mPosCoords );
vbo.bufferNormals( mNormals );
vbo.bufferColorsRGB( mColors );
vbo.unbindBuffers();
}
void CatalogApp::initFaintVbo()
{
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticColorsRGB();
int numFaintStars = mFaintStars.size();
mFaintVbo = gl::VboMesh( numFaintStars, 0, layout, GL_POINTS );
vector<Vec3f> positions;
vector<Color> colors;
for( int i=0; i<numFaintStars; i++ ){
positions.push_back( mFaintStars[i]->mPos );
colors.push_back( Color( mFaintStars[i]->mColor, 0.0f, 0.0f ) );
}
mFaintVbo.bufferPositions( positions );
mFaintVbo.bufferColorsRGB( colors );
mFaintVbo.unbindBuffers();
}
void CatalogApp::initBrightVbo()
{
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticTexCoords2d();
layout.setStaticColorsRGB();
int numVertices = FBO_WIDTH * FBO_HEIGHT;
// 1 quad per particle
// 2 triangles make up the quad
// 3 points per triangle
mBrightVbo = gl::VboMesh( numVertices * 2 * 3, 0, layout, GL_TRIANGLES );
float s = 0.5f;
Vec3f p0( -s, -s, 0.0f );
Vec3f p1( -s, s, 0.0f );
Vec3f p2( s, s, 0.0f );
Vec3f p3( s, -s, 0.0f );
Vec2f t0( 0.0f, 0.0f );
Vec2f t1( 0.0f, 1.0f );
Vec2f t2( 1.0f, 1.0f );
Vec2f t3( 1.0f, 0.0f );
vector<Vec3f> positions;
vector<Vec2f> texCoords;
vector<Color> colors;
for( int x = 0; x < FBO_WIDTH; ++x ) {
for( int y = 0; y < FBO_HEIGHT; ++y ) {
float u = (float)x/(float)FBO_WIDTH;
float v = (float)y/(float)FBO_HEIGHT;
Color c = Color( u, v, 0.0f );
positions.push_back( p0 );
positions.push_back( p1 );
positions.push_back( p2 );
texCoords.push_back( t0 );
texCoords.push_back( t1 );
texCoords.push_back( t2 );
colors.push_back( c );
colors.push_back( c );
colors.push_back( c );
positions.push_back( p0 );
positions.push_back( p2 );
positions.push_back( p3 );
texCoords.push_back( t0 );
texCoords.push_back( t2 );
texCoords.push_back( t3 );
colors.push_back( c );
colors.push_back( c );
colors.push_back( c );
}
}
mBrightVbo.bufferPositions( positions );
mBrightVbo.bufferTexCoords2d( 0, texCoords );
mBrightVbo.bufferColorsRGB( colors );
mBrightVbo.unbindBuffers();
}