//--------------------------------------------------------------
void testApp::keyPressed (int key){
switch(key) {
case 'a': toggleMouseAttract(); break;
case 'p': for(int i=0; i<100; i++) addRandomParticle(); break;
case 'P': for(int i=0; i<100; i++) killRandomParticle(); break;
case 's': addRandomSpring(); break;
case 'S': killRandomSpring(); break;
case 'c': physics.isCollisionEnabled() ? physics.disableCollision() : physics.enableCollision(); break;
case 'C': killRandomConstraint(); break;
case 'r': doRender ^= true; break;
case 'f': addRandomForce(FORCE_AMOUNT); break;
case 'F': addRandomForce(FORCE_AMOUNT * 3); break;
case 'l': lockRandomParticles(); break;
case 'u': unlockRandomParticles(); break;
case ' ': initScene(); break;
case 'x': doMouseXY = true; break;
case 'z': doMouseYZ = true; break;
case ']': rotSpeed += 0.01f; break;
case '[': rotSpeed -= 0.01f; break;
case '+': mouseNode.setMass(mouseNode.getMass() +0.1); break;
case '-': mouseNode.setMass(mouseNode.getMass() -0.1); break;
case 'm': mouseNode.hasCollision() ? mouseNode.disableCollision() : mouseNode.enableCollision();
}
}
//--------------------------------------------------------------
void testApp::draw() {
if(doRender) {
ofEnableAlphaBlending();
glEnable(GL_DEPTH_TEST);
glPushMatrix();
glTranslatef(width/2, 0, -width / 3); // center scene
static float rot = 0;
glRotatef(rot, 0, 1, 0); // rotate scene
rot += rotSpeed; // slowly increase rotation (to get a good 3D view)
if(forceTimer) {
float translateMax = forceTimer;
glTranslatef(ofRandom(-translateMax, translateMax), ofRandom(-translateMax, translateMax), ofRandom(-translateMax, translateMax));
forceTimer--;
}
glDisable(GL_LIGHTING);
glBegin(GL_QUADS);
// draw right wall
glColor3f(.9, 0.9, 0.9); glVertex3f(width/2, height+1, width/2);
glColor3f(1, 1, 1); glVertex3f(width/2, -height, width/2);
glColor3f(0.95, 0.95, 0.95); glVertex3f(width/2, -height, -width/2);
glColor3f(.85, 0.85, 0.85); glVertex3f(width/2, height+1, -width/2);
// back wall
glColor3f(.9, 0.9, 0.9); glVertex3f(width/2, height+1, -width/2);
glColor3f(1, 1, 1); glVertex3f(width/2, -height, -width/2);
glColor3f(0.95, 0.95, 0.95); glVertex3f(-width/2, -height, -width/2);
glColor3f(.85, 0.85, 0.85); glVertex3f(-width/2, height+1, -width/2);
// left wall
glColor3f(.9, 0.9, 0.9); glVertex3f(-width/2, height+1, -width/2);
glColor3f(1, 1, 1); glVertex3f(-width/2, -height, -width/2);
glColor3f(0.95, 0.95, 0.95); glVertex3f(-width/2, -height, width/2);
glColor3f(.85, 0.85, 0.85); glVertex3f(-width/2, height+1, width/2);
// front wall
glColor3f(0.95, 0.95, 0.95); glVertex3f(width/2, -height, width/2);
glColor3f(.85, 0.85, 0.85); glVertex3f(width/2, height+1, width/2);
glColor3f(.9, 0.9, 0.9); glVertex3f(-width/2, height+1, width/2);
glColor3f(1, 1, 1); glVertex3f(-width/2, -height, width/2);
// floor
glColor3f(.8, 0.8, 0.8);
glVertex3f(width/2, height+1, width/2);
glVertex3f(width/2, height+1, -width/2);
glVertex3f(-width/2, height+1, -width/2);
glVertex3f(-width/2, height+1, width/2);
glEnd();
// glEnable(GL_LIGHTING);
// draw springs
glColor4f(0.5, 0.5, 0.5, 0.5);
for(int i=0; i<physics.numberOfSprings(); i++) {
Physics::Spring3D *spring = (Physics::Spring3D *) physics.getSpring(i);
Physics::Particle3D *a = spring->getOneEnd();
Physics::Particle3D *b = spring->getTheOtherEnd();
Vec3f vec = b->getPosition() - a->getPosition();
float dist = vec.length();
float angle = acos( vec.z / dist ) * RAD_TO_DEG;
if(vec.z <= 0 ) angle = -angle;
float rx = -vec.y * vec.z;
float ry = vec.x * vec.z;
glPushMatrix();
glTranslatef(a->getPosition().x, a->getPosition().y, a->getPosition().z);
glRotatef(angle, rx, ry, 0.0);
float size = ofMap(spring->getStrength(), SPRING_MIN_STRENGTH, SPRING_MAX_STRENGTH, SPRING_MIN_WIDTH, SPRING_MAX_WIDTH);
glScalef(size, size, dist);
glTranslatef(0, 0, 0.5);
glutSolidCube(1);
glPopMatrix();
}
// draw particles
glAlphaFunc(GL_GREATER, 0.5);
ofEnableNormalizedTexCoords();
ballImage.getTextureReference().bind();
for(int i=0; i<physics.numberOfParticles(); i++) {
Physics::Particle3D *p = physics.getParticle(i);
if(p->isFixed()) glColor4f(1, 0, 0, 1);
else glColor4f(1, 1, 1, 1);
glEnable(GL_ALPHA_TEST);
// draw ball
glPushMatrix();
glTranslatef(p->getPosition().x, p->getPosition().y, p->getPosition().z);
glRotatef(180-rot, 0, 1, 0);
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(-p->getRadius(), -p->getRadius());
glTexCoord2f(1, 0); glVertex2f(p->getRadius(), -p->getRadius());
glTexCoord2f(1, 1); glVertex2f(p->getRadius(), p->getRadius());
glTexCoord2f(0, 1); glVertex2f(-p->getRadius(), p->getRadius());
glEnd();
glPopMatrix();
glDisable(GL_ALPHA_TEST);
float alpha = ofMap(p->getPosition().y, -height * 1.5, height, 0, 1);
if(alpha>0) {
glPushMatrix();
glTranslatef(p->getPosition().x, height, p->getPosition().z);
glRotatef(-90, 1, 0, 0);
glColor4f(0, 0, 0, alpha * alpha * alpha * alpha);
// ofCircle(0, 0, p->getRadius());
float r = p->getRadius() * alpha;
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(-r, -r);
glTexCoord2f(1, 0); glVertex2f(r, -r);
glTexCoord2f(1, 1); glVertex2f(r, r);
glTexCoord2f(0, 1); glVertex2f(-r, r);
glEnd();
glPopMatrix();
}
}
ballImage.getTextureReference().unbind();
ofDisableNormalizedTexCoords();
glPopMatrix();
}
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDisable(GL_LIGHTING);
glColor4f(0, 0, 0, 1);
drawString( " FPS: " + ofToString(ofGetFrameRate(), 2)
+ " | Number of particles: " + ofToString(physics.numberOfParticles(), 2)
+ " | Number of springs: " + ofToString(physics.numberOfSprings(), 2)
+ " | Mouse Mass: " + ofToString(mouseNode.getMass(), 2)
, 20, 15);
}