Attachment 29269 Details for Bug 23743 – phong pixel shader

phong pixel shader

phong.zfs (text/plain), 2.12 KB, created by Hans Nieser on 2009-09-06 08:12:48 UTC

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Creator: Hans Nieser

Created: 2009-09-06 08:12:48 UTC

Size: 2.12 KB

patch

obsolete

>#define MAX_LIGHTS 0
>
>uniform vec3 z_sun_direction;
>uniform vec3 z_sun_color;
>
>uniform sampler2D z_tex_d;
>
>#if SPECULARMAP
>uniform sampler2D z_tex_s;
>#endif
>
>#if NORMALMAP
>varying vec3 v_tangent;
>varying vec3 v_bitangent;
>uniform sampler2D z_tex_n;
>#endif
>
>varying vec3 v_normal;
>varying vec3 v_fragpos;
>
>varying vec3 Lsun;
>
>void main()
>{
>    float attenuation, spotlight;
>    vec3 N, L, V, S;
>    vec4 diffuse, ambient, color, specular;
>    vec4 tex_color;
>
>    V = normalize(-v_fragpos);
>#if NORMALMAP
>    // Transform normal from normalmap from tangent space, to eye-space.
>    mat3 tangent_to_eye = mat3(v_tangent, v_bitangent, v_normal);
>    vec3 texnormal = texture2D(z_tex_n, gl_TexCoord[0].st).rgb * 2.0 - 1.0;
>    texnormal.rg = -texnormal.rg;
>    N = normalize(tangent_to_eye * texnormal);
>#else
>    N = normalize(v_normal);
>#endif
>
>    // Initialize color to emission+global ambient.
>    color    = gl_FrontMaterial.emission + gl_FrontLightModelProduct.sceneColor;
>
>    // Add diffuse for sun, and initialize specular.
>    S = normalize(Lsun+V);
>    color.rgb += max(0.0, dot(Lsun, N)) * z_sun_color;
>    specular   = vec4(pow(max(dot(S,N),0.0), gl_FrontMaterial.shininess) * z_sun_color, 0.0);
>
>    // Add contribution of each light to color and specular.
>    for (int i = 0; i < MAX_LIGHTS; i++) {
>        L = normalize(gl_LightSource[i].position.xyz - (v_fragpos * gl_LightSource[i].position.w));
>        S = normalize(L+V);
>        attenuation = 1.0; // FIXME
>        spotlight   = 1.0; // FIXME
>        ambient     = gl_FrontLightProduct[i].ambient;
>        diffuse     = max(0.0, dot(L, N)) * gl_FrontLightProduct[i].diffuse;
>        color      += attenuation * spotlight * (ambient + diffuse);
>        specular   += pow(max(dot(S, N), 0.0), gl_FrontMaterial.shininess) *
>                      gl_FrontLightProduct[i].specular;
>    }
>
>    tex_color = texture2D(z_tex_d, gl_TexCoord[0].st);
>
>    gl_FragColor.rgb = color.rgb * tex_color.rgb;
>    gl_FragColor.a = tex_color.a * gl_FrontMaterial.diffuse.a;
>#if SPECULARMAP
>    gl_FragColor.rgb += specular.rgb * texture2D(z_tex_s, gl_TexCoord[0].st).rgb;
>#else
>    gl_FragColor.rgb += specular.rgb;
>#endif
>}
>

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Attachments on bug 23743: 29268 | 29269

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