| Hiding Unseen Objects |
| Whenever you add a lot of objects (especially high poly models) to your world, your FPS begins to drop. So, instead of rendering everything in the world, I decided to only render and draw what is in my FOV. To do this, I created a quick method to check if objects are within my FOV. I also have to change my camera's FOV to 50 instead of the default 45. Otherwise, some objects would "disappear" when I turn and have a widescreen monitor. Lower width screens weren't affected. But, on my 24 inch widescreen monitor, I try to use up as much realestate as possible. Anyways, I added the following method to my PhysicObject.
public static bool IsInsideCone(Vector3 point, Vector3 coneOrigin, Vector3 coneDirection, double coneAngle) { Vector3 tempVect = Vector3.Normalize(point - coneOrigin); return Vector3.Dot(coneDirection, tempVect) >= Math.Cos(coneAngle); } After that, I do a check in my PhysicObject.Draw method before drawing any meshes. My code for this looks like: if (IsInsideCone(body.Position, camera.cameraPosition, camera.cameraDirection, FOVPlusPadding)){ } My PhysicObject.Draw method now looks like this: public override void Draw(GameTime gameTime) { Camera camera = ((GameCore)this.Game).Camera; float FOVPlusPadding = camera.FOV * 1.1f; if (model != null && IsInsideCone(body.Position, camera.cameraPosition, camera.cameraDirection, FOVPlusPadding)) { if (boneTransforms == null || boneCount != model.Bones.Count) { boneTransforms = new Matrix[model.Bones.Count]; boneCount = model.Bones.Count; } model.CopyAbsoluteBoneTransformsTo(boneTransforms); foreach (ModelMesh mesh in model.Meshes) { foreach (BasicEffect effect in mesh.Effects) { if (body.CollisionSkin != null) effect.World = boneTransforms[mesh.ParentBone.Index] * Matrix.CreateScale(scale) * body.CollisionSkin.GetPrimitiveLocal(0).Transform.Orientation * body.Orientation * Matrix.CreateTranslation(body.Position); else effect.World = boneTransforms[mesh.ParentBone.Index] * Matrix.CreateScale(scale) * body.Orientation * Matrix.CreateTranslation(body.Position); effect.View = camera.viewMatrix; effect.Projection = camera.projectionMatrix; ApplyEffects(effect); effect.EnableDefaultLighting(); effect.PreferPerPixelLighting = true; } mesh.Draw(); } } if (this.collision != null) { int count = collision.NumPrimitives; for (int i = 0; i < count; i++) { BoundingBox box = new BoundingBox(); BoundingBoxHelper.AddPrimitive(collision.GetPrimitiveOldWorld(i), ref box); } } base.Draw(gameTime); } |
| ProxyProdigy - January 24, 2009 07:13pm |
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