Beispiel #1
0
//--------------------------------------------------------------
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();
	}
}
Beispiel #2
0
//--------------------------------------------------------------
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);
	
	
	
	
}