DetailMap shader which supports AGK built'in shadows (all 3 modes or mode 3 only) ? :)

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MikeMax

AGK Academic Backer

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Joined: 13th Dec 2011

Location: Paris

Posted: 10th Dec 2017 02:38

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Has anyone already achieved this ?

i have already my Detail map shader (texture stage 2) but i want it to take AppGameKit built'in shadows into account at the same time

i have tried (in shadow mode 1/2 for the moment which use only one texture stage (7) ...) :

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gl_FragColor = texture2D(texture0, uv0Varying) * texture2D(texture2, uv2Varying) * texture2D(texture7, uv7Varying);

but it only darkens the texture without any shadows ... (arg !)... without the shader the object correctly receives shadows

I don't imagine in mode 3 (cascade with all additional texture stage)... lol

Shaders are not my friends :p

thanks for any help

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OriginalKronos

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Posted: 10th Dec 2017 12:46

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You don't need to include anything regarding shadows in the shader. just set the shadows up with the normal commands and don't use texture slots 4-7 on the mesh.

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uniform sampler2D texture0; //texture
uniform sampler2D texture1; //detail
varying vec2 tex_coord; // uv
 
void main()
{
	vec4 tex0= texture2D(texture0, tex_coord);
	vec4 tex1 = texture2D(texture1, tex_coord * 64.0);
	gl_FragColor =  tex0*tex1;

}

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Jeff Miller

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Posted: 10th Dec 2017 12:56

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You might surf the DBPro board. I recall Green Gandalf made a shader for a self-shadowing terrain (where high points on the terrain shadowed lower portions depending upon position of sun). Lee had added ability to load a volume texture to accommodate such experiments. Don't know if AppGameKit does that as yet.

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janbo

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Posted: 10th Dec 2017 22:18 Edited at: 10th Dec 2017 22:19

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To cast shadows you don't need anything in the shader but if you want the object to receive shadows you need to add GetPSLighting( mediump vec3 normal, highp vec3 pos ) in your light calculations.