Castle Game Engine internals

List of Figures

1.1. VRML 1.0 sphere example

1.2. VRML 2.0 sphere example

1.3. Cylinder example, rendered in wireframe mode (because it's unlit, non-wireframe rendering would look confusing)

1.4. VRML points example: yellow point at the bottom, blue point at the top

1.5. A cube and a sphere in VRML 1.0

1.6. An unlit box and a sphere in VRML 2.0

1.7. A box and a translated sphere

1.8. A box, a translated sphere, and a translated and scaled sphere

1.9. Two cones with different materials

1.10. A box and a translated sphere using the same texture

1.11. Three columns of three spheres

1.12. Faces, lines and point sets rendered using the same Coordinate node

1.13. Spheres with various material in VRML 1.0

1.14. An example how properties “leak out” from various grouping nodes in VRML 1.0

1.15. Our earlier example of reusing cone inlined a couple of times, each time with a slight translation and rotation

1.16. Textured cube with various texture transformations

1.17. Viewpoint defined for our previous example with multiplied cones

1.18. Three towers with various creaseAngle settings

2.1. Three 3D objects are rendered here: precalculated dinosaur animation, scripted (could be interactive) fountain animation, and static tower.

2.2. Simple scene, viewed from various viewports simultaneously.

2.3. Interactive scene, with shadows and mirors, viewed from various viewports.

3.1. Different triangulations example (wireframe view)

3.2. Different triangulations example (Gouraud shading)

3.3. Different triangulations example (ray-tracer rendering)

4.1. A sample octree constructed for a scene with two boxes and a sphere

4.2. A nasty case when a box is considered to be colliding with a frustum, but in fact it's outside of the frustum

5.1. lets_take_a_walk scene, side view

5.2. lets_take_a_walk scene, top view

5.3. Generated ground texture

5.4. lets_take_a_walk scene, with ground texture. Side view

5.5. lets_take_a_walk scene, with ground texture. Top view.

6.1. All the trees visible on this screenshot are actually the same tree model, only moved and rotated differently.

6.2. The correct rendering of the trees with volumetric fog

6.3. The wrong rendering of the trees with volumetric fog, if we would use the same arrays/VBO (containing fog coordinate for each vertex) for both trees.

6.4. Rendering without the fog (camera frustum culling is used)

6.5. Rendering with the fog (only objects within the fog visibility range need to be rendered)

6.6. The ghost creature on this screenshot is actually very close to the player. But it's transparent and is rendered incorrectly: gets covered by the ground and trees.

6.7. The transparent ghost rendered correctly: you can see that it's floating right before the player.

6.8. Material transparency with random stipples

6.9. Material transparency with regular stipples

8.1. Fountain level, no shadows

8.2. Fountain level, shadows turned on

8.3. Fountain level, edges marked

8.4. Fountain level, only edges

8.5. Ghost shadows

8.6. Lack of shadows, problem analogous to ghost shadows

8.7. A cylinder capped at the top, open at the bottom

8.8. Cylinder open at the bottom with shadow quads

8.9. Cylinder open at the bottom with shadow edges

8.10. Good shadow from a single triangle

8.11. Good shadow from a single triangle, with shadow volumes drawn

8.12. Bad shadow from a single triangle