1 | #include "../shaderenv.h"
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2 |
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3 |
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4 | struct fragment
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5 | {
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6 | // normalized screen position
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7 | float4 pos: WPOS;
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8 | float4 texCoord: TEXCOORD0;
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9 | float3 view: COLOR0;
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10 | };
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11 |
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12 |
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13 | struct pixel
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14 | {
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15 | float4 color: COLOR0;
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16 | };
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17 |
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18 |
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19 | float2 myreflect(float2 pt, float2 n)
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20 | {
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21 | // distance to plane
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22 | float d = dot(n, pt);
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23 | // reflect around plane
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24 | float2 rpt = pt - d * 2.0f * n;
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25 |
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26 | return rpt;
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27 | }
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28 |
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29 |
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30 | /** function for standard deferred shading
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31 | */
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32 | float4 shade(fragment IN,
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33 | uniform float4 color,
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34 | uniform float4 position,
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35 | uniform float3 normal,
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36 | uniform float emmisive,
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37 | float3 lightDir)
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38 | {
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39 | // diffuse intensity
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40 | const float angle = saturate(dot(normal, lightDir));
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41 |
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42 | float4 lightDiffuse = glstate.light[0].diffuse;
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43 | float4 diffuse = angle * lightDiffuse;
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44 |
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45 | // global ambient
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46 | const float4 ambient = glstate.light[0].ambient;
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47 |
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48 | float4 outColor;
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49 |
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50 | //if (color.w > 1e19f) outColor = color;
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51 | if (emmisive > 1.5f) outColor = color;
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52 | else outColor = (ambient + diffuse) * color;
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53 |
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54 | return outColor;
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55 | //return saturate((((ambient + diffuse)) * (1.0f - emmisive) + emmisive) * color);
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56 | }
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57 |
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58 |
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59 |
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60 | /** The mrt shader for standard rendering
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61 | */
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62 | pixel main(fragment IN,
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63 | uniform sampler2D colors,
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64 | uniform sampler2D positions,
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65 | uniform sampler2D normals,
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66 | uniform float3 lightDir,
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67 | uniform sampler2D oldColors
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68 | )
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69 | {
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70 | pixel OUT;
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71 |
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72 | float4 norm = tex2D(normals, IN.texCoord.xy);
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73 | float4 color = tex2Dlod(colors, float4(IN.texCoord.xy, 0, 0));
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74 | float4 position = tex2D(positions, IN.texCoord.xy);
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75 |
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76 | // an ambient color term
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77 | float amb = color.w;
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78 |
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79 | float3 normal = normalize(norm.xyz);
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80 |
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81 | float4 col = shade(IN, color, position, normal, amb, lightDir);
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82 |
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83 | OUT.color = col;
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84 |
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85 |
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86 | ////////////
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87 | //-- write out logaritmic luminance for tone mapping
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88 |
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89 | float4 oldColor = tex2Dlod(colors, float4(IN.texCoord.xy, 0, MAX_LOD_LEVEL));
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90 |
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91 | const float3 w = float3(0.299f, 0.587f, 0.114f);
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92 |
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93 | float lum = dot(OUT.color.rgb, w);
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94 | float logLum = log(1e-5f + lum);
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95 |
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96 | float logLumOffset = MINLOGLUM * INV_LOGLUM_RANGE;
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97 | float logLumScaled = logLum * INV_LOGLUM_RANGE - logLumOffset;
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98 |
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99 | if (oldColor.w > 0)
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100 | OUT.color.w = lerp(oldColor.w, logLumScaled, 0.1f);
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101 | else
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102 | OUT.color.w = logLumScaled;
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103 |
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104 | return OUT;
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105 | }
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106 |
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107 |
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108 | float CalcShadowTerm(fragment IN,
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109 | uniform sampler2D shadowMap,
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110 | uniform float w,
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111 | uniform float2 lightSpacePos,
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112 | uniform float depth,
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113 | uniform float2 samples[NUM_PCF_TABS],
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114 | uniform sampler2D noiseTexture
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115 | )
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116 | {
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117 | //float shadowDepth = tex2D(shadowMap, lightSpacePos).x;
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118 | //return step(depth, shadowDepth);
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119 |
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120 | float total_d = 0.0;
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121 |
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122 | for (int i = 0; i < NUM_PCF_TABS; ++ i)
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123 | {
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124 | const float2 offset = samples[i];
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125 |
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126 | #if 1
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127 | ////////////////////
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128 | //-- add random noise: reflect around random normal vector (warning: slow!)
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129 |
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130 | float2 mynoise = tex2D(noiseTexture, IN.texCoord.xy).xy;
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131 | const float2 offsetTransformed = myreflect(offset, mynoise);
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132 | #else
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133 | const float2 offsetTransformed = offset;
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134 | #endif
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135 | // weight with projected coordinate to reach similar kernel size for near and far
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136 | float2 texcoord = lightSpacePos + offsetTransformed * w;
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137 |
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138 | float shadowDepth = tex2D(shadowMap, texcoord).x;
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139 |
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140 | total_d += step(depth, shadowDepth);
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141 | }
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142 |
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143 | total_d /= (float)NUM_PCF_TABS;
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144 |
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145 | return total_d;
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146 | }
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147 |
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148 |
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149 | pixel main_shadow(fragment IN,
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150 | uniform sampler2D colors,
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151 | uniform sampler2D positions,
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152 | uniform sampler2D normals,
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153 | uniform sampler2D shadowMap,
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154 | uniform float4x4 shadowMatrix,
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155 | uniform float maxDepth,
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156 | uniform float sampleWidth,
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157 | uniform sampler2D noiseTexture,
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158 | uniform float2 samples[NUM_PCF_TABS],
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159 | uniform float3 lightDir,
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160 | uniform sampler2D oldColors
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161 | )
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162 | {
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163 | pixel OUT;
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164 |
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165 | float4 norm = tex2D(normals, IN.texCoord.xy);
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166 | float4 color = tex2Dlod(colors, float4(IN.texCoord.xy, 0, 0));
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167 | float4 position = tex2D(positions, IN.texCoord.xy);
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168 |
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169 | const float3 normal = normalize(norm.xyz);
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170 |
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171 | // hack: an emmisive color term
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172 | float emmisive = color.w;
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173 |
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174 | // diffuse intensity
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175 | const float angle = saturate(dot(normal, lightDir));
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176 | //float4 lightDiffuse = float4(1.0f, 1.0f, 0.9f, 1.0f);
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177 | const float4 lightDiffuse = glstate.light[0].diffuse;
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178 | //float4(1.0f, 1.0f, 0.9f, 1.0f);
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179 |
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180 | float4 diffuse = lightDiffuse * angle;
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181 |
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182 | // calc diffuse illumination + shadow term
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183 | if ((emmisive < 1.5f) // hack: prevent shadowing the sky
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184 | && (angle > 1e-3f) // shadow only if diffuse color has some minimum intensity
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185 | )
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186 | {
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187 | position *= maxDepth;
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188 | position.w = 1.0f;
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189 |
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190 | float4 lightSpacePos = mul(shadowMatrix, position);
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191 | lightSpacePos /= lightSpacePos.w;
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192 |
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193 | float shadowTerm = CalcShadowTerm(IN, shadowMap, sampleWidth, lightSpacePos.xy, lightSpacePos.z, samples, noiseTexture);
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194 |
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195 | diffuse *= shadowTerm;
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196 | }
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197 |
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198 | // light ambient term
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199 | const float4 ambient = glstate.light[0].ambient;
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200 |
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201 | // base lighting
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202 | OUT.color = (emmisive > 1.5f) ? color: (ambient + diffuse) * color;
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203 |
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204 |
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205 | ////////////
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206 | //-- write out logaritmic luminance for tone mapping
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207 |
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208 | float4 oldColor = tex2Dlod(colors, float4(IN.texCoord.xy, 0, MAX_LOD_LEVEL));
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209 |
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210 | const float3 w = float3(0.299f, 0.587f, 0.114f);
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211 |
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212 | float lum = dot(OUT.color.rgb, w);
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213 | float logLum = log(1e-5f + lum);
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214 |
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215 | float logLumOffset = MINLOGLUM * INV_LOGLUM_RANGE;
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216 | float logLumScaled = logLum * INV_LOGLUM_RANGE - logLumOffset;
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217 |
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218 | if (oldColor.w > 0)
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219 | OUT.color.w = lerp(oldColor.w, logLumScaled, 0.1f);
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220 | else
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221 | OUT.color.w = logLumScaled;
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222 |
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223 | return OUT;
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224 | }
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225 |
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