//--------------------------------------------------------------
void testApp::draw(){
ofPushMatrix();
if(doShader) {
shader.begin();
// set thickness of ribbons
shader.setUniform1f("thickness", 20);
// make light direction slowly rotate
shader.setUniform3f("lightDir", sin(ofGetElapsedTimef()/10), cos(ofGetElapsedTimef()/10), 0);
}
glColor3f(1, 1, 1);
ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2, 0);
ofRotateX(mouseY);
ofRotateY(mouseX);
for(int i=1; i<points.size(); i++) {
ofLine(points[i-1], points[i]);
}
if(doShader) shader.end();
ofPopMatrix();
ofDrawBitmapString("fps: " + ofToString((int)ofGetFrameRate()) + "\nPress 's' to toggle shader: " + (doShader ? "ON" : "OFF"), 20, 20);
}
void testApp::runShader(ofxFBO& fbo, ofxShader& shader) {
fbo.begin();
shader.begin();
texRect(w, h);
shader.end();
fbo.end();
}
void testApp::setTexture(char* name, ofxShader& shader, ofImage& img, int location) {
ofTextureData texData = img.getTextureReference().getTextureData();
glActiveTexture(GL_TEXTURE0 + location);
glEnable(texData.textureTarget);
glBindTexture(texData.textureTarget, texData.textureID);
glDisable(texData.textureTarget);
shader.setUniform(name, location);
}
//--------------------------------------------------------------
void testApp::setup(){
ofSetLogLevel(OF_LOG_VERBOSE);
ofBackground(50, 50, 50);
ofSetVerticalSync(false);
ofEnableAlphaBlending();
shader.setGeometryInputType(GL_LINES);
shader.setGeometryOutputType(GL_TRIANGLE_STRIP);
shader.setGeometryOutputCount(4);
shader.setup("shaders/vert.glsl", "shaders/frag.glsl", "shaders/geom.glsl");
printf("Maximum number of output vertices support is: %i\n", shader.getGeometryMaxOutputCount());
// create a bunch of random points
float r = ofGetHeight()/2;
for(int i=0; i<100; i++) {
points.push_back(ofPoint(ofRandomf() * r, ofRandomf() * r, ofRandomf() * r));
}
glEnable(GL_DEPTH_TEST);
}
