/** Render the current frame */
private static void render() {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(30f, aspect, 1f, 10000000f);
float look = anchorL.z * 5;
gluLookAt(look, look, anchorL.z, 0, 0, 0, 0, 0, 1);
glClearColor(.5f, 0.5f, 0.5f, .5f);
// clear the screen
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
{
// int systemDimLength = cube.sideLength / 2;
// rotate square according to angle
glRotatef(angle, 0, 0, 1.0f);
// glColor3f(1f, 1f, 1f);
// cube.glSurfaceDraw();
/*
* Draw the particle in the system
*/
glColor3f(0.0f, 1.0f, 0.0f);
glPointSize(3.0f);
/*
* glBegin(GL_POINTS); { for (Particle p : system) {
* glVertex3f(p.x.x, p.x.y, p.x.z); } } glEnd();
*/
/*
* Draw the lines
*/
glLineWidth(2.0f);
for (Constraint p : constraints) {
glBegin(GL_LINES);
{
glVertex3f(p.getA().x.x, p.getA().x.y, p.getA().x.z);
glVertex3f(p.getB().x.x, p.getB().x.y, p.getB().x.z);
}
glEnd();
}
/*
* Shadows, just for effect!
*/
glColor4f(0, 0, 0, .5f);
/*
* glBegin(GL_POINTS); { for (Particle p : system) {
* glVertex3f(p.x.x, p.x.y, -systemDimLength); } } glEnd();
*/
/*
* Draw the line shadows
*/
for (Constraint p : constraints) {
glBegin(GL_LINES);
{
glVertex3f(p.getA().x.x, p.getA().x.y, -0);
glVertex3f(p.getB().x.x, p.getB().x.y, -0);
}
glEnd();
}
glBegin(GL_LINES);
{
glVertex3f(anchorL.x, anchorL.y, -0);
glVertex3f(anchorR.x, anchorR.y, -0);
}
glEnd();
glColor3f(1, 0, 0);
/*
* Draw the tension line
*/
glBegin(GL_LINES);
{
glVertex3f(anchorL.x, anchorL.y, -0);
glVertex3f(anchorL.x, anchorL.y, anchorL.z);
glVertex3f(anchorL.x, anchorL.y, anchorL.z);
glVertex3f(anchorR.x, anchorR.y, anchorR.z);
glVertex3f(anchorR.x, anchorR.y, anchorR.z);
glVertex3f(anchorR.x, anchorR.y, -0);
}
glEnd();
}
glPopMatrix();
}
