/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
// get input first
gatherInput();
// move player and handle player arena collisions
Vector3 prevPlayerPosition = mPlayer.position;
mPlayer.update(gameTime);
// make sure player can't move inside geometry
correctPlayerPosition(mPlayer, prevPlayerPosition);
// check for mouse pressed: user can create a new sphere
if (mouseInput.LeftButton == ButtonState.Pressed &&
previousMouseInput.LeftButton == ButtonState.Released &&
mSimulator.numSpheres < MaximumSimulatedSpheres)
{
mSimulator.addSphere(mPlayer.position, mPlayer.shootDirection() * 20f);
}
// check for other keys pressed on keyboard
if (keyboardInput.IsKeyDown(Keys.N) && !previousKeyboardInput.IsKeyDown(Keys.N))
{
mArena.normalMapping = !mArena.normalMapping;
mOverlay.normalMappingEnabled = mArena.normalMapping;
}
if (keyboardInput.IsKeyDown(Keys.T) && !previousKeyboardInput.IsKeyDown(Keys.T))
{
mArena.noTextures = !mArena.noTextures;
mOverlay.texturesEnabled = !mArena.noTextures;
}
if (keyboardInput.IsKeyDown(Keys.C) && !previousKeyboardInput.IsKeyDown(Keys.C))
{
mOverlay.drawCollidingTriangles = !mOverlay.drawCollidingTriangles;
}
if (keyboardInput.IsKeyDown(Keys.G) && !previousKeyboardInput.IsKeyDown(Keys.G))
{
mOverlay.drawCollisionGeometry = !mOverlay.drawCollisionGeometry;
}
if (keyboardInput.IsKeyDown(Keys.L) && !previousKeyboardInput.IsKeyDown(Keys.L))
{
mCurrentLightPosition = (mCurrentLightPosition + 1) % ((uint)mLightPositions.Length);
mLightRotationY = 0;
}
// update spheres simulation
mSimulator.update(gameTime);
// update list of colliding faces
foreach (Face f in mSimulator.collidingFaces.Keys)
{
if (mCollidingFacesBuffer.ContainsKey(f))
{
mCollidingFacesBuffer[f] = mNumTicksCollidingFaceIsVisible;
}
else
{
mCollidingFacesBuffer.Add(f, mNumTicksCollidingFaceIsVisible);
}
}
// subtract 1 from remaining frames counter for each face. remove faces with counter 0
Face[] tmpBuffer = new Face[mCollidingFacesBuffer.Count];
mCollidingFacesBuffer.Keys.CopyTo(tmpBuffer, 0);
foreach (Face f in tmpBuffer)
{
if (mCollidingFacesBuffer[f] <= 1)
{
mCollidingFacesBuffer.Remove(f);
}
else
{
mCollidingFacesBuffer[f]--;
}
}
// check for Quit key (Q) or (ESC) pressed
if (keyboardInput.IsKeyDown(Keys.Q) || keyboardInput.IsKeyDown(Keys.Escape))
{
Exit();
}
// rotate light
mLightRotationY += 0.0002f;
Vector3 curLightPos = Vector3.Transform(mLightPositions[mCurrentLightPosition], Matrix.CreateRotationY(mLightRotationY));
mRenderer.lightPosition = curLightPos;
// update average timing data
mAverageCollisionTime += mSimulator.timeCollisions;
mAveragePhysicsTime += mSimulator.timePhysics;
mNumTicksInCurrentAverage++;
if (mNumTicksInCurrentAverage == mNumFramesForAverage)
{
mOverlay.timeCollisions = mAverageCollisionTime / mNumFramesForAverage;
mOverlay.timePhysics = mAveragePhysicsTime / mNumFramesForAverage;
mAverageCollisionTime = 0;
mAveragePhysicsTime = 0;
mNumTicksInCurrentAverage = 0;
}
// set data for UI
mOverlay.numSpheres = mSimulator.numSpheres;
mOverlay.numCollisions = mSimulator.collidingFaces.Count;
mOverlay.numTrianglesChecked = (mSimulator.numCollisionTests + 1) * mArena.CollisionData.geometry.faces.Length; // also count player level collisions
// update UI
mOverlay.update(gameTime);
base.Update(gameTime);
}
