Rim lightening

[YouGroove]

Shader idea for later : Something great for non realistic games :

[shadmar]

Not tested but give it a shot :

 

in vertex shader add :

 

out vec3 eye;

 

Find :

vec4 modelvertexposition = entitymatrix_ * vec4(vertex_position,1.0);

 

After add :

eye = normalize( modelvertexposition.xyz - cameraposition );

 

In fragment shader :

 

Add :

in vec3 eye;

 

after all normal calculations add :

 

//calculate rim
float NormalToCam = 1.0 - abs(dot(eye*cameranormalmatrix,normal));
float rim = smoothstep(0.0, 1.0, NormalToCam); //adjust here for rim thickness

 

Find :

 

fragData0 = ...

 

After add :

fragData0+=vec4(rim,rim,rim,0);

[gamecreator]

Ha, Spelunky - great game

[YouGroove]

I tried but it failed.

In fact it's modifying diffuse shader ? Will that work with animated diffuse shader ?

 

after all normal calculations add :

Where it is ? seems last lines in fragment ?

 

 

Find :

 

fragData0 = ...

 

After add :

fragData0+=vec4(rim,rim,rim,0);

The problem is this is before normal map calculation.

[shadmar]

In a simple diffuse shader without normalmapping, normal calculation is just a passthrough from the vertexshader like this :

 

vec3 normal = ex_normal;

 

so after that then

[YouGroove]

I changed camera variable as it didn't existed, but even like that it don't compile ?

rim.zip

[shadmar]

Ah just add this under uniforms in the fragshader.

 

uniform mat3 cameranormalmatrix;

 

There I go for writing shaders from a tablet..

[YouGroove]

Thanks it worked :

 

I put Rim shader file here , could be part of LE3 official shader package

rim.zip