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Make texgen reflections work WIP

This commit is contained in:
Jannik Vogel 2015-07-27 18:41:15 +02:00
parent 5bfdab5b5b
commit 6655d711eb
1 changed files with 55 additions and 14 deletions
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69
hw/xbox/nv2a_shaders.c
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@ -115,6 +115,22 @@ static QString* generate_fixed_function(const ShaderState state,
qstring_append(s,
"\n"
/* FIXME: Add these uniforms using code when they are used */
"uniform vec4 texPlaneS0;\n"
"uniform vec4 texPlaneT0;\n"
"uniform vec4 texPlaneQ0;\n"
"uniform vec4 texPlaneR0;\n"
"uniform vec4 texPlaneS1;\n"
"uniform vec4 texPlaneT1;\n"
"uniform vec4 texPlaneQ1;\n"
"uniform vec4 texPlaneR1;\n"
"uniform vec4 texPlaneS2;\n"
"uniform vec4 texPlaneT2;\n"
"uniform vec4 texPlaneQ2;\n"
"uniform vec4 texPlaneR2;\n"
"uniform vec4 texPlaneS3;\n"
"uniform vec4 texPlaneT3;\n"
"uniform vec4 texPlaneQ3;\n"
"uniform vec4 texPlaneR3;\n"
"uniform mat4 texMat0;\n"
"uniform mat4 texMat1;\n"
"uniform mat4 texMat2;\n"
@ -206,37 +222,62 @@ static QString* generate_fixed_function(const ShaderState state,
/* FIXME: could be nicer if some channels share the same texgen */
for (j = 0; j < 4; j++) {
char c = "xyzw"[j];
char cSuffix = "STRQ"[i];
switch (state.texgen[i][j]) {
case TEXGEN_DISABLE:
qstring_append_fmt(s,
"tTexture%d.%c = texture%d.%c;\n",
qstring_append_fmt(s, "tTexture%d.%c = texture%d.%c;\n",
i, c, i, c);
break;
case TEXGEN_EYE_LINEAR:
qstring_append_fmt(s,
"tTexture%d.%c = tPosition.%c;\n",
i, c, c);
/* FIXME: This might not have to be done? {
* FIXME: calculate tTexPlane[STRQ][0-3] - I guess this happens skinned?
* tTexPlane[STRQ][0-3] = texPlane[STRQ][0-3] * invModelViewMat[%d or 0?!] probably
* }
*/
qstring_append_fmt(s, "vec4 tTexPlane%c%d = texPlane%c%d * invModelViewMat0;\n",
cSuffix, i, cSuffix, i);
qstring_append_fmt(s, "tTexture%d.%c = dot(tTexPlane%c%d, tPosition);\n",
i, c, cSuffix, i);
break;
case TEXGEN_OBJECT_LINEAR:
qstring_append_fmt(s,
"tTexture%d.%c = position.%c;\n",
i, c, c);
qstring_append_fmt(s, "tTexture%d.%c = dot(texPlane%c%d, position);\n",
i, c, cSuffix, i);
break;
case TEXGEN_SPHERE_MAP:
assert(i < 2); /* Channels S,T only! */
assert(false);
qstring_append(s, "{\n");
/* FIXME: r and m only have to be calculated once */
qstring_append(s, " vec3 u = normalize(tPosition.xyz);\n");
//FIXME: tNormal before or after normalization? Always normalize?
qstring_append(s, " vec3 r = reflect(u, tNormal);\n");
/* FIXME: This would consume 1 division fewer and *might* be faster than length:
* // [z=1/(2*x) => z=1/x*0.5]
* vec3 ro = r + vec3(0.0, 0.0, 1.0);
* float m = inversesqrt(dot(ro,ro))*0.5;
*/
qstring_append(s, " float invM = 1.0 / (2.0 * length(r + vec3(0.0, 0.0, 1.0)));\n");
qstring_append_fmt(s, " tTexture%d.%c = r.%c * invM + 0.5;\n",
i, c, c);
qstring_append(s, "}\n");
break;
case TEXGEN_REFLECTION_MAP:
assert(i < 3); /* Channels S,T,R only! */
qstring_append_fmt(s,
"tTexture%d.%c = reflect(???, tNormal).%c;\n",
qstring_append(s, "{\n");
/* FIXME: u and r only have to be calculated once, can share the one from SPHERE_MAP */
qstring_append(s, " vec3 u = normalize(tPosition.xyz);\n");
qstring_append(s, " vec3 r = reflect(u, tNormal);\n");
qstring_append_fmt(s, " tTexture%d.%c = r.%c;\n",
i, c, c);
assert(false); /* FIXME: Code not complete yet! */
qstring_append(s, "}\n");
break;
case TEXGEN_NORMAL_MAP:
assert(i < 3); /* Channels S,T,R only! */
qstring_append_fmt(s,
"tTexture%d.%c = tNormal.%c;\n",
qstring_append_fmt(s, "tTexture%d.%c = tNormal.%c;\n",
i, c, c);
break;
default: