Sign in to follow this  

Shadow mapping problem [solved]

This topic is 3594 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hello! I’ve got a problem with shadow mapping and ambient lighting. The shaded side of my objects receives a strange artifact when the shadow is on the polygon. It’s like the edge gets even darker where it should have the ambient color intensity. This picture shows the problem.
I calculate the fragment color in this GLSL shader:
// Calculate the light ambient, diffuse and specular values
directionalLight(0,normal,gl_FrontMaterial.shininess,ambient,diffuse,specular);

// Final color variable
vec4 color=vec4(0.0);

// Add the sceneColor value
color += gl_FrontLightModelProduct.sceneColor * texColor;

// Add the light values (amb,dif,spe) and material+texture, multiply with shadowmap texture intensity (0.0-1.0)
color += ambient * gl_FrontMaterial.ambient * texColor ;
color += diffuse * gl_FrontMaterial.diffuse * texColor * shadowShade;
color += specular * gl_FrontMaterial.specular * shadowShade;
color.a=texColor.a;

gl_FragColor = color;

The ambient, diffuse and specular values are the values of gl_LightSource[0]. The shadowShade value is derived from shadow2D(). I’m not sure how to combine the texture rgb values with the lighting model and the current material. I have tried to make this to work for two days but I just can’t get it. Any help appreciated! [Edited by - O-san on February 12, 2008 8:47:19 AM]

Share this post


Link to post
Share on other sites

This topic is 3594 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this