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Altering render pass?

by FruitBatInShades · in Torque Game Engine · 01/19/2005 (7:21 am) · 9 replies

Has anyone managed to tap into the graphics layer to achieve the following sort of effects?

1. Overlay png on each frame (NightVision goggles etc)
2. Affect the lighting (Flash bangs etc)
3. Morph the screen (confused, drugged etc)
4. Different camera pass (sniper scope etc.)

Is it possible to add/execute GL commands to the scene before the final render is passed? Any demos, code, tutorials :oD
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Associate Manoel Neto
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#1
01/19/2005 (9:58 am)
AFAIK, you can copy the back buffer into a texture and use it before flipping. You could re-draw the texture on a tesselated quad with some animated distortion, or draw it again with additive blending for some flash effects.

I think you can use copyTexSubImage to do it.

Torque Owner FruitBatInShades
#2
01/19/2005 (10:06 am)
@Manoel: Do you have any demo code I could borrow :o)

Torque Owner Mz
#3
01/19/2005 (10:10 am)
Numbers 1 and 4 you can probably do with HUD elements.

Number 2 you just need to add a light, or again use a HUD element to 'blind' players.

Associate Anthony Rosenbaum
#4
01/19/2005 (10:18 am)
2) is already in the engine something like whiteOut() it is a shapebase function

Torque Owner FruitBatInShades
#5
01/19/2005 (10:25 am)
@Anthony: Thanks I'll check the docs
@Marc: 4 needs to be a different camera as your are zoomed in on the subject so I need to get the players view from a different camera, but not move the player.

Torque Owner Mz
#6
01/19/2005 (11:07 am)
You don't need a second camera, you just need to change the fov (field of view) to get a zoom effect.

Associate Manoel Neto
Default Studio Name
#7
01/19/2005 (12:09 pm)
Here:
nehe.gamedev.net/data/lessons/lesson.asp?lesson=36

This NEHE tutorial shows the basics of render to texture in openGL (without using p-buffers).

Torque Owner FruitBatInShades
#8
01/21/2005 (5:21 am)
I know i'm being thick but where do i change the field of view?

Torque Owner FruitBatInShades
#9
01/21/2005 (5:26 am)
Durr.. zoomed view is already implemented in starter.fps!