Teejoon
adceccf402
Changed so that the picking pass get drawn once in the beginning so that the AO shatde could calculate AO from the depthbuffer generated during pthe pickingpass. In the ImGUI debugg window there is now sliders to change the behavior of the AO shader. Only the minimum ambient lightning is HardCoded in to the frowardPlus fragmentshaders with a define in the begining.
252 lines
8.5 KiB
GLSL
252 lines
8.5 KiB
GLSL
#version 430
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#define MIN_AMBIENT_LIGHT 0.3
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uniform mat4 M;
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uniform mat4 V;
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uniform mat4 P;
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uniform vec2 ScreenDimensions;
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uniform float FillPercentage;
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uniform vec4 DiffuseColor;
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uniform vec4 FillColor;
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uniform vec4 Color;
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uniform vec4 AmbientColor;
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//Get bineded at the same time as the textures
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uniform vec2 DiffuseUVRepeat1;
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uniform vec2 DiffuseUVRepeat2;
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uniform vec2 DiffuseUVRepeat3;
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uniform vec2 NormalUVRepeat1;
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uniform vec2 NormalUVRepeat2;
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uniform vec2 NormalUVRepeat3;
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uniform vec2 SpecularUVRepeat1;
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uniform vec2 SpecularUVRepeat2;
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uniform vec2 SpecularUVRepeat3;
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uniform vec2 GlowUVRepeat1;
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uniform vec2 GlowUVRepeat2;
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uniform vec2 GlowUVRepeat3;
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layout (binding = 0) uniform sampler2D AOTexture;
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layout (binding = 1) uniform sampler2D SplatMapTexture;
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layout (binding = 2) uniform sampler2D DiffuseTexture1;
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layout (binding = 3) uniform sampler2D DiffuseTexture2;
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layout (binding = 4) uniform sampler2D DiffuseTexture3;
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layout (binding = 5) uniform sampler2D NormalMapTexture1;
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layout (binding = 6) uniform sampler2D NormalMapTexture2;
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layout (binding = 7) uniform sampler2D NormalMapTexture3;
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layout (binding = 8) uniform sampler2D SpecularMapTexture1;
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layout (binding = 9) uniform sampler2D SpecularMapTexture2;
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layout (binding = 10) uniform sampler2D SpecularMapTexture3;
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layout (binding = 11) uniform sampler2D GlowMapTexture1;
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layout (binding = 12) uniform sampler2D GlowMapTexture2;
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layout (binding = 13) uniform sampler2D GlowMapTexture3;
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#define TILE_SIZE 16
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struct LightSource {
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vec4 Position;
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vec4 Direction;
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vec4 Color;
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float Radius;
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float Intensity;
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float Falloff;
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int Type;
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};
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layout (std430, binding = 1) buffer LightBuffer
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{
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LightSource List[];
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} LightSources;
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struct LightGrid {
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float Start;
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float Amount;
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vec2 Padding;
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};
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layout (std430, binding = 2) buffer LightGridBuffer
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{
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LightGrid Data[];
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} LightGrids;
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layout (std430, binding = 4) buffer LightIndexBuffer
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{
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float LightIndex[];
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};
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in VertexData{
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vec3 Position;
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vec3 Normal;
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vec3 Tangent;
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vec3 BiTangent;
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vec2 TextureCoordinate;
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vec4 ExplosionColor;
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float ExplosionPercentageElapsed;
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}Input;
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out vec4 sceneColor;
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out vec4 bloomColor;
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struct LightResult {
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vec4 Diffuse;
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vec4 Specular;
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};
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float CalcAttenuation(float radius, float dist, float falloff) {
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return 1.0 - smoothstep(radius * 0.3, radius, dist);
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}
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vec4 CalcSpecular(vec4 lightColor, vec4 viewVec, vec4 lightVec, vec4 normal) {
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vec4 R = normalize( reflect(-lightVec, normal));
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float RdotV = max( dot(R, viewVec), 0.0);
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return lightColor * pow(RdotV, 90.0);
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}
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vec4 CalcDiffuse(vec4 lightColor, vec4 lightVec, vec4 normal) {
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float power = max( dot(normal, lightVec), 0.0);
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return lightColor * power;
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}
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LightResult CalcPointLightSource(vec4 lightPos, float lightRadius, vec4 lightColor, float intensity, vec4 viewVec, vec4 position, vec4 normal, float falloff)
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{
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vec4 L = lightPos - position;
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float dist = length(L);
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L = normalize(L);
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float attenuation = CalcAttenuation(lightRadius, dist, falloff);
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LightResult result;
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result.Diffuse = CalcDiffuse(lightColor, L, normal) * attenuation * intensity;
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result.Specular = CalcSpecular(lightColor, viewVec, L, normal) * attenuation * intensity;
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return result;
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}
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LightResult CalcDirectionalLightSource(vec4 direction, vec4 color, float intensity, vec4 viewVec, vec4 vertNormal)
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{
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vec4 L = normalize( -vec4(direction.xyz, 0) );
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LightResult result;
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result.Diffuse = CalcDiffuse(color, L, vertNormal) * intensity;
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result.Specular = CalcSpecular(color, viewVec, L, vertNormal) * intensity;
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return result;
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}
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vec4 CalcNormalMappedValue(vec3 normal, vec3 tangent, vec3 bitangent, vec2 textureCoordinate, sampler2D normalMap)
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{
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mat3 TBN = mat3(tangent, bitangent, normal);
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vec3 NormalMap = texture(normalMap, textureCoordinate).xyz * 2.0 - vec3(1.0);
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return vec4(TBN * normalize(NormalMap), 0.0);
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}
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vec4 CalcBlendedTexel(vec4 blendValue, sampler2D R, sampler2D G, sampler2D B,
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vec2 R_TileValues, vec2 G_TileValues, vec2 B_TileValues){
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vec4 R_Channel = texture2D(R, Input.TextureCoordinate * R_TileValues);
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vec4 G_Channel = texture2D(G, Input.TextureCoordinate * G_TileValues);
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vec4 B_Channel = texture2D(B, Input.TextureCoordinate * B_TileValues);
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float total = blendValue.r + blendValue.g + blendValue.b;
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float totalDiv = 1.0f / total;
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blendValue.r = blendValue.r * totalDiv;
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blendValue.g = blendValue.g * totalDiv;
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blendValue.b = blendValue.b * totalDiv;
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return blendValue.r * R_Channel
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+ blendValue.g * G_Channel
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+ blendValue.b * B_Channel;
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}
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vec4 CalcBlendedNormal(vec4 blendValue, sampler2D R, sampler2D G, sampler2D B,
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vec2 R_TileValues, vec2 G_TileValues, vec2 B_TileValues){
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mat3 TBN = mat3(Input.Tangent, Input.BiTangent, Input.Normal);
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vec3 R_Channel = texture(R, Input.TextureCoordinate * R_TileValues).xyz * 2.0 - vec3(1.0);
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vec3 G_Channel = texture(G, Input.TextureCoordinate * G_TileValues).xyz * 2.0 - vec3(1.0);
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vec3 B_Channel = texture(B, Input.TextureCoordinate * B_TileValues).xyz * 2.0 - vec3(1.0);
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float total = blendValue.r + blendValue.g + blendValue.b + blendValue.a;
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float totalDiv = 1 / total;
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blendValue.r = blendValue.r * totalDiv;
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blendValue.g = blendValue.g * totalDiv;
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blendValue.b = blendValue.b * totalDiv;
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vec3 Normal_result = blendValue.r * R_Channel
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+ blendValue.g * G_Channel
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+ blendValue.b * B_Channel;
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return vec4(TBN * normalize(Normal_result), 0.0);
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}
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void main()
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{
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float ao = texelFetch(AOTexture, ivec2(gl_FragCoord.xy), 0).r;
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ao = (clamp(1.0 - (1.0 - ao), 0.0, 1.0) + MIN_AMBIENT_LIGHT) / (1.0 + MIN_AMBIENT_LIGHT);
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vec4 splatTexel = texture2D(SplatMapTexture, Input.TextureCoordinate);
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vec4 diffuseTexel = CalcBlendedTexel(splatTexel, DiffuseTexture1, DiffuseTexture2, DiffuseTexture3,
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DiffuseUVRepeat1, DiffuseUVRepeat2, DiffuseUVRepeat3);
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vec4 glowTexel = CalcBlendedTexel(splatTexel, GlowMapTexture1, GlowMapTexture2, GlowMapTexture3,
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GlowUVRepeat1, GlowUVRepeat2, GlowUVRepeat3);
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vec4 specularTexel = CalcBlendedTexel(splatTexel, SpecularMapTexture1, SpecularMapTexture2, SpecularMapTexture3,
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SpecularUVRepeat1, SpecularUVRepeat2, SpecularUVRepeat3);
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vec4 position = V * M * vec4(Input.Position, 1.0);
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//vec4 normal = V * CalcNormalMappedValue(Input.Normal, Input.Tangent, Input.BiTangent, Input.TextureCoordinate, SplatMapTexture);
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vec4 normal = V * CalcBlendedNormal(splatTexel, NormalMapTexture1, NormalMapTexture2, NormalMapTexture3,
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NormalUVRepeat1, NormalUVRepeat2, NormalUVRepeat3);
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normal = normalize(normal);
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//vec4 normal = normalize(V * vec4(Input.Normal, 0.0));
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vec4 viewVec = normalize(-position);
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vec2 tilePos;
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tilePos.x = int(gl_FragCoord.x/TILE_SIZE);
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tilePos.y = int(gl_FragCoord.y/TILE_SIZE);
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LightResult totalLighting;
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totalLighting.Diffuse = vec4(AmbientColor.rgb * ao, 1.0);
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int currentTile = int(floor(gl_FragCoord.x/TILE_SIZE) + (floor(gl_FragCoord.y/TILE_SIZE) * int(ScreenDimensions.x/TILE_SIZE)));
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int start = int(LightGrids.Data[currentTile].Start);
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int amount = int(LightGrids.Data[currentTile].Amount);
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for(int i = start; i < start + amount; i++) {
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int l = int(LightIndex[i]);
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LightSource light = LightSources.List[l];
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LightResult light_result;
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//These if statements should be removed.
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if(light.Type == 1) { // point
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light_result = CalcPointLightSource(V * light.Position, light.Radius, light.Color, light.Intensity, viewVec, position, normal, light.Falloff);
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} else if (light.Type == 2) { //Directional
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light_result = CalcDirectionalLightSource(V * light.Direction, light.Color, light.Intensity, viewVec, normal);
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}
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totalLighting.Diffuse += vec4(light_result.Diffuse.rgb * ao, light_result.Diffuse.a);
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totalLighting.Specular += vec4(light_result.Specular.rgb * ao, light_result.Specular.a);
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}
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vec4 color_result = mix((Color * diffuseTexel * DiffuseColor), Input.ExplosionColor, Input.ExplosionPercentageElapsed);
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color_result = color_result * (totalLighting.Diffuse + (totalLighting.Specular * specularTexel));
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//vec4 color_result = (DiffuseColor + Input.ExplosionColor) * (totalLighting.Diffuse + (totalLighting.Specular * specularTexel)) * diffuseTexel * Color;
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float pos = ((P * vec4(Input.Position, 1)).y + 1.0)/2.0;
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if(pos <= FillPercentage) {
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color_result += FillColor;
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}
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sceneColor = vec4(color_result.xyz, clamp(color_result.a, 0, 1));
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color_result += glowTexel*3;
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bloomColor = vec4(clamp(color_result.xyz - 1.0, 0, 100), 1.0);
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//Tiled Debug Code
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/*
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if(int(gl_FragCoord.x)%16 == 0 || int(gl_FragCoord.y)%16 == 0 ) {
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sceneColor += vec4(0.5, 0, 0, 0);
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} else {
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sceneColor += vec4(LightGrids.Data[int(tilePos.x + tilePos.y*80)].Amount/LightSources.List.length(), 0, 0, 1);
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}
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*/
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}
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