Tagged Questions
-4
votes
0answers
67 views
OpenGL parsing normals from obj gets shading wrong [closed]
I have written a simple OBJ file parser for my game engine and it renders everything correctly, but, when I try and use the normals to do lighting it gets shaded all wrong!
I draw using an index ...
2
votes
0answers
62 views
Fragments never falling into spot light's cone
I am using GLSL version 1.20 with OpenGL 2.1 .
I am trying to compute when a fragment falls into the area of a spot light. I have already set all the light values with glLightfv and glLightf, also ...
-1
votes
1answer
140 views
OpenGl / C++ and some strange light problem on half board [closed]
I have some problem with lights in my opengl "game". I have board with is square (-50,50), (50, 50), (50, -50), (-50,-50) x and z since y doesn't matter at all.
I tried to make something like ...
2
votes
2answers
272 views
How to create realistic 2d lighting using colour temperature
I'm looking for a lighting algorithm that produces realistic lights expressed in kelvins, from about 2500k to 6500k. What I'm confused about is how to make the lights properly interact with the colors ...
2
votes
1answer
407 views
Radiosity lightmap generation
Is there any working C++ source code for a lightmap generation algorithm using Radiosity or any other GI system? I've found technical papers only, but I can't really find any implementation.
2
votes
2answers
428 views
Lighting problems with Terrain
I'm in the process of learning Open GL and am having issues with lighting on my Terrian, I don't know if the issue is related to how I calculate my normals or the shader itself (I am using the shader ...
1
vote
0answers
90 views
How do I get my polygons to be lighted by either side?
Okay, I am using Ogre3D and Gorilla(2D library for ogre3D) and I am making Gorilla::Screenrenderables in the open scene.
The problem that I am having is that when I make a light and have my ...
1
vote
1answer
268 views
Why isn't my lighting working properly? Are my normals messed up?
I'm relatively new to OpenGL and I am trying to draw a 3D model (loaded from a 3ds file using lib3ds) using OpenGL with lighting, but about half of it is drawn in black.
I set up the light as such:
...
3
votes
2answers
2k views
My Ambient lighting is not working correctly
I'm having a problem when using ambient lights in my opengl game.
When I first started with my program, i had a positioned light, and the code was this:
GLfloat AmbientColor[] = ...
1
vote
1answer
258 views
Materials when rendering geometry
When specifying the material (ambient/diffuse/specular) for use in lighting calculations, what level of detail is the material specified at? Per vertex, mesh, bone?
