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Point lights

This commit is contained in:
Jannik Vogel 2015-08-06 03:29:17 +02:00
parent 00aa96af3e
commit b7936a463d
1 changed files with 40 additions and 19 deletions

59
hw/xbox/nv2a_shaders.c
View File

@ -337,13 +337,19 @@ static QString* generate_fixed_function(const ShaderState state,
qstring_append_fmt(h,
"uniform vec3 lightLocalPosition%d;\n"
"uniform vec3 lightAttenuation%d;\n",
"uniform vec3 lightLocalAttenuation%d;\n",
i, i);
qstring_append_fmt(s,"vec3 eye = vec3(0.0);\n"); /*FIXME: Uniform?! */
qstring_append_fmt(s,
" float distance = distance(lightLocalPosition%d, tPosition.xyz);\n"
" float attenuation = 1.0 / (lightAttenuation%d.x\n"
" + lightAttenuation%d.y * distance\n"
" + lightAttenuation%d.z * distance * distance);\n",
" vec3 VP = lightLocalPosition%d - tPosition.xyz/tPosition.w;\n"
" float d = length(VP);\n"
" VP = normalize(VP);\n"
" float attenuation = 1.0 / (lightLocalAttenuation%d.x\n"
" + lightLocalAttenuation%d.y * d\n"
" + lightLocalAttenuation%d.z * d * d);\n"
" vec3 halfVector = normalize(VP + eye);\n"
" float nDotVP = max(0.0, dot(tNormal, VP));\n"
" float nDotHV = max(0.0, dot(tNormal, halfVector));\n",
i, i, i, i);
}
@ -358,9 +364,10 @@ static QString* generate_fixed_function(const ShaderState state,
"uniform vec3 lightInfiniteDirection%d;\n",
i, i);
qstring_append_fmt(s,
" float L = dot(tNormal, lightInfiniteDirection%d);\n"
" float attenuation = max(L, 0.0);\n",
i);
" float attenuation = 1.0;\n"
" float nDotVP = max(0.0, dot(tNormal, normalize(vec3(lightInfiniteDirection%d))));\n"
" float nDotHV = max(0.0, dot(tNormal, vec3(lightInfiniteHalfVector%d)));\n",
i, i);
/* FIXME: Do specular */
@ -384,19 +391,33 @@ static QString* generate_fixed_function(const ShaderState state,
}
qstring_append_fmt(s,
" float highlight = 0.0;\n"
" vec3 lightDiffuse = attenuation * lightDiffuseColor%d;\n"
" vec3 lightSpecular = highlight * lightSpecularColor%d;\n"
" tD0.xyz += lightAmbientColor%d;\n" /* FIXME: Clamp? */
" tD0.xyz += diffuse.xyz * lightDiffuse;\n"
" tD1.xyz += specular.xyz * lightSpecular;\n"
"}\n",
" float pf;\n"
" if (nDotVP == 0.0) {\n"
" pf = 0.0;\n"
" } else {\n"
" pf = pow(nDotHV, /* specular(l, m, n, l1, m1, n1) */ 0.001);\n"
" }\n"
" vec3 lightAmbient = lightAmbientColor%d * attenuation;\n"
" vec3 lightDiffuse = lightDiffuseColor%d * attenuation * nDotVP;\n"
" vec3 lightSpecular = lightSpecularColor%d * pf;\n",
i, i, i);
qstring_append(s,
" tD0.xyz += lightAmbient;\n");
qstring_append(s,
" tD0.xyz += diffuse.xyz * lightDiffuse;\n");
qstring_append(s,
" tD1.xyz += specular.xyz * lightSpecular;\n"
"}\n");
}
} else {
qstring_append(s, "vec4 tD0 = diffuse;\n");
qstring_append(s, "vec4 tD1 = specular;\n");
}
qstring_append(s, "vec4 tB0 = backDiffuse;\n");
qstring_append(s, "vec4 tB1 = backSpecular;\n");
/* Fog */
if (state.fog_enable) {
@ -509,10 +530,10 @@ static QString* generate_fixed_function(const ShaderState state,
" gl_Position.z = gl_Position.z * 2.0 - gl_Position.w;\n");
qstring_append(s, "vtx.inv_w = 1.0/gl_Position.w;\n");
qstring_append(s, "vtx.D0 = tD0 * vtx.inv_w;\n");
qstring_append(s, "vtx.D1 = tD1 * vtx.inv_w;\n");
qstring_append(s, "vtx.B0 = backDiffuse * vtx.inv_w;\n");
qstring_append(s, "vtx.B1 = backSpecular * vtx.inv_w;\n");
qstring_append(s, "vtx.D0 = clamp(tD0, 0.0, 1.0) * vtx.inv_w;\n");
qstring_append(s, "vtx.D1 = clamp(tD1, 0.0, 1.0) * vtx.inv_w;\n");
qstring_append(s, "vtx.B0 = clamp(tB0, 0.0, 1.0) * vtx.inv_w;\n");
qstring_append(s, "vtx.B1 = clamp(tB1, 0.0, 1.0) * vtx.inv_w;\n");
qstring_append(s, "vtx.Fog = tFog * vtx.inv_w;\n");
qstring_append(s, "vtx.T0 = tTexture0 * vtx.inv_w;\n");
qstring_append(s, "vtx.T1 = tTexture1 * vtx.inv_w;\n");