protected void render() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
glLoadIdentity();
camera.look();
// Each frame we calculate the new frustum. In reality you only need to
// calculate the frustum when we move the camera.
GameCore.gFrustum.calculateFrustum();
// Initialize the total node count that is being draw per frame
Octree.totalNodesDrawn = 0;
glPushMatrix();
// Here we draw the octree, starting with the root node and recursing down each node.
// This time, we pass in the root node and just the original world model. You could
// just store the world in the root node and not have to keep the original data around.
// This is up to you. I like this way better because it's easy, though it could be
// more error prone.
octree.drawOctree(octree, g_World);
glPopMatrix();
// Render the cubed nodes to visualize the octree (in wire frame mode)
if (g_bDisplayNodes) Octree.debug.drawBoundingBox();
glPushMatrix();
// If there was a collision, make the Orange ball Red.
if (octree.isObjectColliding()) {
glColor3f(1.0f, 0.0f, 0.0f);
} else {
glColor3f(1.0f, 0.5f, 0.0f); // Disable Lighting.
}
// Move the Ball into place.
glTranslatef(g_BallEntity.x, g_BallEntity.y, g_BallEntity.z);
glDisable(GL_LIGHTING);
// Draw the Ground Intersection Line.
glBegin(GL_LINES);
glColor3f(1, 1, 1);
glVertex3f(g_vGroundISector[0].x, g_vGroundISector[0].y, g_vGroundISector[0].z);
glVertex3f(g_vGroundISector[1].x, g_vGroundISector[1].y, g_vGroundISector[1].z);
glEnd();
// Draw the Forward Intersection Line.
glBegin(GL_LINES);
glColor3f(1, 1, 0);
glVertex3f(
g_vForwardISector[0].x * 10.0f, g_vForwardISector[0].y, g_vForwardISector[0].z * 10.0f);
glVertex3f(
g_vForwardISector[1].x * 10.0f, g_vForwardISector[1].y, g_vForwardISector[1].z * 10.0f);
glEnd();
// Re-enable lighting.
glEnable(GL_LIGHTING);
// System.out.println("x " + g_BallEntity.x + " y " + g_BallEntity.y);
// Draw it!
pObj.draw(g_BallEntity.fRadius, 20, 20);
glPopMatrix();
screen.setTitle(
"Triangles: "
+ Octree.maxTriangles
+ " -Total Draw: "
+ Octree.totalNodesDrawn
+ " -Subdivisions: "
+ Octree.maxSubdivisions
+ " -FPS: "
+ FPSCounter.get()
+ " -Node Collisions: "
+ Octree.numNodesCollided
+ " -Object Colliding? "
+ octree.isObjectColliding());
}
public void checkGameInput() {
if (drawMode.isPressed()) {
octree.setRenderMode(!octree.isRenderMode());
octree.setObjectColliding(false);
if (octree.isRenderMode()) {
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); // Render the triangles in fill mode
} else {
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); // Render the triangles in wire frame mode
}
octree.createDisplayList(octree, g_World, octree.getDisplayListID());
}
if (fullScreen.isPressed()) {
setFullScreen(!isFullScreen());
}
if (enter.isPressed()) {
Octree.octreeCollisionDetection = !Octree.octreeCollisionDetection;
}
if (left.isPressed()) {
camera.strafe(-SPEED / 10 * elapsedTime);
}
if (right.isPressed()) {
camera.strafe(SPEED / 10 * elapsedTime);
}
if (zoomIn.isPressed()) {
camera.move(+SPEED / 10 * elapsedTime);
}
if (zoomOut.isPressed()) {
camera.move(-SPEED / 10 * elapsedTime);
}
if (moveLeft.isPressed()) {
g_BallEntity.fAngle += (float) AR_DegToRad(g_BallEntity.fTurnRate) * elapsedTime;
}
if (moveRight.isPressed()) {
// Rotate the Ball Angle Counter Clockwise.
g_BallEntity.fAngle -= (float) AR_DegToRad(g_BallEntity.fTurnRate) * elapsedTime;
}
// Clamp values above 2 * PI or 360 Deg's.
if (g_BallEntity.fAngle >= AR_2PI) g_BallEntity.fAngle = g_BallEntity.fAngle - AR_2PI;
// Clamp values below 0.
if (g_BallEntity.fAngle < 0.0f) g_BallEntity.fAngle = AR_2PI + g_BallEntity.fAngle;
if (debug.isPressed()) {
g_bDisplayNodes = !g_bDisplayNodes;
}
if (moveUp.isPressed()) {
if (g_BallEntity.fVelX + (g_BallEntity.fAccel * elapsedTime) < g_BallEntity.fMaxVel) {
g_BallEntity.fVelX += g_BallEntity.fAccel * elapsedTime;
g_BallEntity.fVelZ += g_BallEntity.fAccel * elapsedTime;
}
}
if (moveDown.isPressed()) {
// Move the Ball Backwards.
if (g_BallEntity.fVelX - (g_BallEntity.fAccel * elapsedTime) > g_BallEntity.fMinVel) {
g_BallEntity.fVelX -= g_BallEntity.fAccel * elapsedTime;
g_BallEntity.fVelZ -= g_BallEntity.fAccel * elapsedTime;
}
}
// Apply Gravity to this Entity (using time based motion) if he's not colliding with anything.
if (!octree.isObjectColliding()) g_BallEntity.fVelY += (GRAVITY * elapsedTime);
// Apply (spherical based) motion.
g_BallEntity.x +=
(g_fSinTable[(int) AR_RadToDeg(g_BallEntity.fAngle)] * g_BallEntity.fVelX) * elapsedTime;
g_BallEntity.y += g_BallEntity.fVelY * elapsedTime;
g_BallEntity.z +=
(g_fCosTable[(int) AR_RadToDeg(g_BallEntity.fAngle)] * g_BallEntity.fVelZ) * elapsedTime;
// Adjust the Forward I-Sectors Endpoint.
g_vForwardISector[1].x =
g_fSinTable[(int) AR_RadToDeg(g_BallEntity.fAngle)] * g_BallEntity.fRadius * 0.2f;
g_vForwardISector[1].y = 0.0f;
g_vForwardISector[1].z =
g_fCosTable[(int) AR_RadToDeg(g_BallEntity.fAngle)] * g_BallEntity.fRadius * 0.2f;
// Slow this guy down (friction).
if (g_BallEntity.fVelX > g_fFriction * elapsedTime) {
g_BallEntity.fVelX -= g_fFriction * elapsedTime;
}
if (g_BallEntity.fVelZ > g_fFriction * elapsedTime) {
g_BallEntity.fVelZ -= g_fFriction * elapsedTime;
}
if (g_BallEntity.fVelX < g_fFriction * elapsedTime) {
g_BallEntity.fVelX += g_fFriction * elapsedTime;
}
if (g_BallEntity.fVelZ < g_fFriction * elapsedTime) {
g_BallEntity.fVelZ += g_fFriction * elapsedTime;
}
// If this Ball falls outside the world, drop back from the top.
if (g_BallEntity.y < -30) {
g_BallEntity.x = g_BallEntity.z = 0.0f;
g_BallEntity.y = 5.0f;
g_BallEntity.fVelX = g_BallEntity.fVelY = g_BallEntity.fVelZ = 0.0f;
}
Vector3f[] vGroundLine = {new Vector3f(), new Vector3f()};
Vector3f[] vForwardLine = {new Vector3f(), new Vector3f()};
// Prepare a Temporary line transformed to the Balls exact world position.
vGroundLine[0].x = g_BallEntity.x + g_vGroundISector[0].x;
vGroundLine[0].y = g_BallEntity.y + g_vGroundISector[0].y;
vGroundLine[0].z = g_BallEntity.z + g_vGroundISector[0].z;
vGroundLine[1].x = g_BallEntity.x + g_vGroundISector[1].x;
vGroundLine[1].y = g_BallEntity.y + g_vGroundISector[1].y;
vGroundLine[1].z = g_BallEntity.z + g_vGroundISector[1].z;
// Prepare a Temporary line transformed to the Balls exact world position.
vForwardLine[0].x = g_BallEntity.x + g_vForwardISector[0].x;
vForwardLine[0].y = g_BallEntity.y + g_vForwardISector[0].y;
vForwardLine[0].z = g_BallEntity.z + g_vForwardISector[0].z;
vForwardLine[1].x = g_BallEntity.x + g_vForwardISector[1].x;
vForwardLine[1].y = g_BallEntity.y + g_vForwardISector[1].y;
vForwardLine[1].z = g_BallEntity.z + g_vForwardISector[1].z;
// A temporary Vector holding the Intersection Point of our Intersection Check.
vIntersectionPt = new Vector3f();
// Reset the Status of the Object (wheter it is colliding or not).
octree.setObjectColliding(false);
// Reset the Nodes collided to zero so we can start with a fresh count.
Octree.numNodesCollided = 0;
// Test the line for an intersection with the Octree Geometry.
if (octree.intersectLineWithOctree(octree, g_World, vGroundLine, vIntersectionPt)) {
// Move the Ball up from the point at which it collided with the ground. This is what
// ground clamping is!
g_BallEntity.x = vIntersectionPt.x;
// NOTE: Make sure it is above the surface, AND half it's height (so it isn't half
// underground).
// This would only apply if you placed entity's by their exact center.
g_BallEntity.y = vIntersectionPt.y + g_BallEntity.fRadius;
g_BallEntity.z = vIntersectionPt.z;
// Stop your up-down velocity.
g_BallEntity.fVelY = 0.0f;
}
// Test the line for an intersection with the Octree Geometry.
if (octree.intersectLineWithOctree(octree, g_World, vForwardLine, vIntersectionPt)) {
// Move the Ball up from the point at which it collided with the ground. This is what
// ground clamping is!
g_BallEntity.x = vIntersectionPt.x;
// NOTE: Make sure it is above the surface, AND half it's height (so it isn't half
// underground).
// This would only apply if you placed entity's by their exact center.
g_BallEntity.y = vIntersectionPt.y + g_BallEntity.fRadius;
g_BallEntity.z = vIntersectionPt.z;
// Stop your up-down velocity.
g_BallEntity.fVelY = 0.0f;
}
}