Programming related to the visual representation of information on computer screens.

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2
votes
2answers
349 views

How are red dot/reflex/holographic sights implemented?

In first-person-shooters like Call of Duty, the hologram only appears when it is behind the glass portion of the sight. In OpenGL, would it be implemented by rendering the glass to the stencil buffer ...
1
vote
1answer
59 views

Apply an special effect to an scene area

I have a 2D game where I have a second camera on my scene, that renders an upside down image of the scene, and distorts it, giving the effect of water reflection. I render this camera first, and on ...
-3
votes
1answer
121 views

I need to make a create-a-class system like in COD

I need to make a create-a-class system like in COD but I don't know what code I need. I am also wondering if I have to make a photoshop image for every way it could look or do I type in the code to ...
2
votes
0answers
50 views

Tangents face the same direction on opposite sides of mesh

I have noticed that the tangent vectors that I am calculating are not always facing the correct direction. The tangents on the left and right of the mesh both face the same direction. Here is a ...
2
votes
0answers
445 views

Can I use a shader with 2 different textures in Cocos2D (x)?

We are evaluating a variety of different graphic engines for use in our game and we want to be able to use 2 different textures for many of our sprite maps. One sprite map would be the standard RGBA ...
1
vote
0answers
52 views

Why does XNA create two GraphicsDeviceManager services?

While working with XNA today, I looked at the debugger information for Game.Services to retrieve the GraphicsDeviceManager so that a component could utilize it. Instead, I found two different objects: ...
1
vote
0answers
47 views

How can I approximate an “opening fan”-transformation?

Is there a way to—with matrices—transform something as if opening the image on a Japanese folding fan? Image from Wikimedia Commons. I'm at a loss of what to call it, so pointers towards avenues of ...
1
vote
0answers
237 views

How do you tell OpenGL ES 2.0 to use a texture as the depth buffer?

I want to render a scene with an outline post processing effect in OpenGL ES 2.0. First I render all the opaque objects. Then I use a post processing shader for silhouette detection that uses the ...
1
vote
0answers
206 views

Batching Homogeneous Render Objects in XNA, 2D Component-Entity Engine?

I've been working on my component-entity engine for about 3 months now, and have managed to get nearly every constituent system working with little effort or compromise. My system has the following ...
0
votes
0answers
56 views

'Bad' triangles when doing affine texture mapping

I am really clueless about what i must do. I wrote a function to do affine texture mapping, but i get in most situations 'bad' triangles. I really didn't want to ask this question as it probably is ...
0
votes
0answers
82 views

How to get drawing offsets for an isometric camera

I do have some semi-working code, but I'm really stuck on getting everything to align to the screen properly. Here's my current, broken solution in Javascript: //ts = tile size (i.e. 64), th = ts/2, ...
0
votes
0answers
128 views

Fixing/avoiding Z-fighting with decals OpenGL

I'm trying to draw animated flames as a decal in OpenGL (just a simple quad with an animated texture as a decal on another quad). Problem is as the camera moves away I get terrible Z-fighting in the ...