phiol

As the title says , is there an easy way to keep the light and fog effect when using jit.gl.shader.

As I understand, @lighting_enable 1 in OB3D does not work when using jit.gl.shader.

I found this code in the forum which is suppose to add the internal light & fog shader to a custom gl.shader code.

https://cycling74.com/forums/gl-shader-make-the-fog-effect-disappear/

I was wondering if things had change since 2009. More precisely, If there was a new way around this with max 6 and 7.

Thank you very much in advance for your help :-)

Hi all
As the title says , is there an easy way to keep the light and fog effect when using jit.gl.shader.
As I understand,  @lighting_enable 1 in OB3D does not work when using jit.gl.shader. 

I found this code in the forum which is suppose to add the internal light & fog shader to a custom gl.shader code.
https://cycling74.com/forums/gl-shader-make-the-fog-effect-disappear/
I can't seem to get this to work.
I was wondering if things had change since 2009. More precisely, If there was a new way around this with max 6 and 7. 

Thank you very much in advance for your help :-) 

https://cycling74.com/forums/gl-shader-make-the-fog-effect-disappear/


jit-gl-shader-and-adding-light-and-fog-to-jxs-code-an-easy-way

jit.gl.material supports fog shading. otherwise you must incorporate into your shader.

the following code snippets will calculate fog color based on the gl-object fog parameters. you call them by passing the distance of the current fragment (e.g. length(vetex) ) and the current color.

vec4 fog_linear(vec4 color, float dist) {
    float fogfactor = (gl_Fog.end-dist)*gl_Fog.scale;
    fogfactor = clamp(fogfactor, 0., 1.);
    return mix(gl_Fog.color, color, fogfactor);
}
vec4 fog_exp(vec4 color, float dist) {
    float fogfactor = exp(-gl_Fog.density * dist);
    fogfactor = clamp(fogfactor, 0., 1.);
    return mix(gl_Fog.color, color, fogfactor);
}
vec4 fog_exp2(vec4 color, float dist) {
    float fogfactor = exp(-gl_Fog.density*gl_Fog.density * dist*dist);
    fogfactor = clamp(fogfactor, 0., 1.);
    return mix(gl_Fog.color, color, fogfactor);
}



jit.gl.material supports fog shading. otherwise you must incorporate into your shader.
the following code snippets will calculate fog color based on the gl-object fog parameters. you call them by passing the distance of the current fragment (e.g. length(vetex) ) and the current color.

vec4 fog_linear(vec4 color, float dist) {
	float fogfactor = (gl_Fog.end-dist)*gl_Fog.scale;
	fogfactor = clamp(fogfactor, 0., 1.);
	return mix(gl_Fog.color, color, fogfactor);
}
vec4 fog_exp(vec4 color, float dist) {
	float fogfactor = exp(-gl_Fog.density * dist);
	fogfactor = clamp(fogfactor, 0., 1.);
	return mix(gl_Fog.color, color, fogfactor);
}
vec4 fog_exp2(vec4 color, float dist) {
	float fogfactor = exp(-gl_Fog.density*gl_Fog.density * dist*dist);
	fogfactor = clamp(fogfactor, 0., 1.);
	return mix(gl_Fog.color, color, fogfactor);
}



Actually , I should of left "fog" out of the title. 

Was more concerned with the light, is it the same principle?

I had tried hooking up a jit.gl.material to the jit.gl.gridshape in the above patch but "no dice!"

Actually , I should of left  "fog" out of the title. 
Was more concerned with the light, is it the same principle?   

I had tried hooking up a jit.gl.material to the jit.gl.gridshape in the above patch but "no dice!"
that's why i created this thread, 

yup, you will have to incorporate your own lighting code into the shader. here is a good place to start: 

http://www.lighthouse3d.com/tutorials/glsl-12-tutorial/lighting/

yup, you will have to incorporate your own lighting code into the shader. here is a good place to start: http://www.lighthouse3d.com/tutorials/glsl-12-tutorial/lighting/


jit.gl.shader and keeping light and fog to jxs code (an easy way)