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HDR: Properly handle AC3D transparent materials

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This commit is contained in:
Fernando García Liñán 2021-08-19 18:20:37 +02:00
parent 765a7d88f5
commit 7ff31e9004
11 changed files with 488 additions and 7 deletions
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95
Effects/glass.eff
View file

@ -68,6 +68,15 @@
<lightmap-color type="vec3d" n="2"> 1.0 1.0 1.0 </lightmap-color>
<lightmap-factor type="float" n="3">1.0</lightmap-factor>
<lightmap-color type="vec3d" n="3"> 1.0 1.0 1.0 </lightmap-color>
<texture n="8">
<image>Textures/PBR/dfg_lut.dds</image>
<type>2d</type>
<filter>linear</filter>
<mag-filter>linear</mag-filter>
<wrap-s>clamp-to-edge</wrap-s>
<wrap-t>clamp-to-edge</wrap-t>
<internal-format>normalized</internal-format>
</texture>
</parameters>
<technique n="4">
@ -519,9 +528,93 @@
<technique n="1">
<scheme>hdr-geometry</scheme>
</technique>
<!-- TODO: Actually implement a glass shader instead of just hiding it -->
<technique n="2">
<scheme>hdr-forward</scheme>
<pass>
<!-- Reverse floating point depth buffer -->
<depth>
<function>gequal</function>
<near>1.0</near>
<far>0.0</far>
</depth>
<texture-unit>
<unit>0</unit>
<type><use>texture[0]/type</use></type>
<image><use>texture[0]/image</use></image>
<filter><use>texture[0]/filter</use></filter>
<mag-filter><use>texture[0]/mag-filter</use></mag-filter>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
<texture-unit>
<unit>8</unit>
<image><use>texture[8]/image</use></image>
<type><use>texture[8]/type</use></type>
<filter><use>texture[8]/filter</use></filter>
<mag-filter><use>texture[8]/mag-filter</use></mag-filter>
<wrap-s><use>texture[8]/wrap-s</use></wrap-s>
<wrap-t><use>texture[8]/wrap-t</use></wrap-t>
<internal-format><use>texture[8]/internal-format</use></internal-format>
</texture-unit>
<blend>1</blend>
<rendering-hint>transparent</rendering-hint>
<cull-face><use>cull-face</use></cull-face>
<program>
<vertex-shader>Shaders/HDR/geometry-transparent.vert</vertex-shader>
<fragment-shader>Shaders/HDR/geometry-transparent.frag</fragment-shader>
<fragment-shader>Shaders/HDR/gbuffer-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/lighting-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/aerial-perspective-include.frag</fragment-shader>
</program>
<uniform>
<name>color_tex</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>color_mode</name>
<type>int</type>
<value><use>material/color-mode</use></value>
</uniform>
<uniform>
<name>material_diffuse</name>
<type>float-vec4</type>
<value><use>material/diffuse</use></value>
</uniform>
<uniform>
<name>minimum_alpha</name>
<type>float</type>
<value>0.1</value>
</uniform>
<!-- Lighting include -->
<uniform>
<name>dfg_lut</name>
<type>sampler-2d</type>
<value type="int">8</value>
</uniform>
<uniform>
<name>prefiltered_envmap</name>
<type>sampler-cube</type>
<value type="int">9</value>
</uniform>
<uniform>
<name>shadow_tex</name>
<type>sampler-2d-shadow</type>
<value type="int">10</value>
</uniform>
<!-- Aerial perspective include -->
<uniform>
<name>aerial_perspective_lut</name>
<type>sampler-2d</type>
<value type="int">11</value>
</uniform>
<uniform>
<name>transmittance_lut</name>
<type>sampler-2d</type>
<value type="int">12</value>
</uniform>
</pass>
</technique>
</PropertyList>

91
Effects/model-combined-transparent.eff
View file

@ -6,11 +6,102 @@ and fallback to plain transparency when the model shader is disabled.
<PropertyList>
<name>Effects/model-combined-transparent</name>
<inherits-from>Effects/model-combined</inherits-from>
<parameters>
<texture n="8">
<image>Textures/PBR/dfg_lut.dds</image>
<type>2d</type>
<filter>linear</filter>
<mag-filter>linear</mag-filter>
<wrap-s>clamp-to-edge</wrap-s>
<wrap-t>clamp-to-edge</wrap-t>
<internal-format>normalized</internal-format>
</texture>
</parameters>
<technique n="1">
<scheme>hdr-geometry</scheme>
</technique>
<technique n="2">
<scheme>hdr-forward</scheme>
<pass>
<!-- Reverse floating point depth buffer -->
<depth>
<function>gequal</function>
<near>1.0</near>
<far>0.0</far>
</depth>
<texture-unit>
<unit>0</unit>
<type><use>texture[0]/type</use></type>
<image><use>texture[0]/image</use></image>
<filter><use>texture[0]/filter</use></filter>
<mag-filter><use>texture[0]/mag-filter</use></mag-filter>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
<texture-unit>
<unit>8</unit>
<image><use>texture[8]/image</use></image>
<type><use>texture[8]/type</use></type>
<filter><use>texture[8]/filter</use></filter>
<mag-filter><use>texture[8]/mag-filter</use></mag-filter>
<wrap-s><use>texture[8]/wrap-s</use></wrap-s>
<wrap-t><use>texture[8]/wrap-t</use></wrap-t>
<internal-format><use>texture[8]/internal-format</use></internal-format>
</texture-unit>
<blend>1</blend>
<rendering-hint>transparent</rendering-hint>
<cull-face><use>cull-face</use></cull-face>
<program>
<vertex-shader>Shaders/HDR/geometry-transparent.vert</vertex-shader>
<fragment-shader>Shaders/HDR/geometry-transparent.frag</fragment-shader>
<fragment-shader>Shaders/HDR/gbuffer-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/lighting-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/aerial-perspective-include.frag</fragment-shader>
</program>
<uniform>
<name>color_tex</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>color_mode</name>
<type>int</type>
<value><use>material/color-mode</use></value>
</uniform>
<uniform>
<name>material_diffuse</name>
<type>float-vec4</type>
<value><use>material/diffuse</use></value>
</uniform>
<!-- Lighting include -->
<uniform>
<name>dfg_lut</name>
<type>sampler-2d</type>
<value type="int">8</value>
</uniform>
<uniform>
<name>prefiltered_envmap</name>
<type>sampler-cube</type>
<value type="int">9</value>
</uniform>
<uniform>
<name>shadow_tex</name>
<type>sampler-2d-shadow</type>
<value type="int">10</value>
</uniform>
<!-- Aerial perspective include -->
<uniform>
<name>aerial_perspective_lut</name>
<type>sampler-2d</type>
<value type="int">11</value>
</uniform>
<uniform>
<name>transmittance_lut</name>
<type>sampler-2d</type>
<value type="int">12</value>
</uniform>
</pass>
</technique>
</PropertyList>

7
Effects/model-combined.eff
View file

@ -1340,6 +1340,11 @@ please see Docs/README.model-combined.eff for documentation
<type>int</type>
<value><use>normalmap-enabled</use></value>
</uniform>
<uniform>
<name>normalmap_dds</name>
<type>int</type>
<value><use>normalmap-dds</use></value>
</uniform>
<uniform>
<name>normalmap_tiling</name>
<type>float</type>
@ -1347,7 +1352,7 @@ please see Docs/README.model-combined.eff for documentation
</uniform>
</pass>
</technique>
<technique n="9">
<predicate><value type="bool">false</value></predicate>
</technique>

43
Effects/model-default.eff
View file

@ -651,4 +651,47 @@
</pass>
</technique>
<technique n="109">
<scheme>hdr-geometry</scheme>
<pass>
<!-- Reverse floating point depth buffer -->
<depth>
<function>gequal</function>
<near>1.0</near>
<far>0.0</far>
</depth>
<texture-unit>
<unit>0</unit>
<type><use>texture[0]/type</use></type>
<image><use>texture[0]/image</use></image>
<filter><use>texture[0]/filter</use></filter>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
<blend>0</blend>
<rendering-hint>opaque</rendering-hint>
<cull-face><use>cull-face</use></cull-face>
<program>
<vertex-shader>Shaders/HDR/geometry.vert</vertex-shader>
<fragment-shader>Shaders/HDR/geometry.frag</fragment-shader>
<fragment-shader>Shaders/HDR/gbuffer-include.frag</fragment-shader>
</program>
<uniform>
<name>color_tex</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>color_mode</name>
<type>int</type>
<value><use>material/color-mode</use></value>
</uniform>
<uniform>
<name>material_diffuse</name>
<type>float-vec4</type>
<value><use>material/diffuse</use></value>
</uniform>
</pass>
</technique>
</PropertyList>

89
Effects/model-transparent.eff
View file

@ -31,6 +31,15 @@
<use>/sim/rendering/shaders/skydome</use>
</fogtype>
<!-- END fog include -->
<texture n="8">
<image>Textures/PBR/dfg_lut.dds</image>
<type>2d</type>
<filter>linear</filter>
<mag-filter>linear</mag-filter>
<wrap-s>clamp-to-edge</wrap-s>
<wrap-t>clamp-to-edge</wrap-t>
<internal-format>normalized</internal-format>
</texture>
</parameters>
<technique n="11">
<pass>
@ -123,6 +132,84 @@
</technique>
<technique n="129">
<scheme>hdr-forward</scheme>
<pass>
<!-- Reverse floating point depth buffer -->
<depth>
<function>gequal</function>
<near>1.0</near>
<far>0.0</far>
</depth>
<texture-unit>
<unit>0</unit>
<type><use>texture[0]/type</use></type>
<image><use>texture[0]/image</use></image>
<filter><use>texture[0]/filter</use></filter>
<mag-filter><use>texture[0]/mag-filter</use></mag-filter>
<wrap-s><use>texture[0]/wrap-s</use></wrap-s>
<wrap-t><use>texture[0]/wrap-t</use></wrap-t>
</texture-unit>
<texture-unit>
<unit>8</unit>
<image><use>texture[8]/image</use></image>
<type><use>texture[8]/type</use></type>
<filter><use>texture[8]/filter</use></filter>
<mag-filter><use>texture[8]/mag-filter</use></mag-filter>
<wrap-s><use>texture[8]/wrap-s</use></wrap-s>
<wrap-t><use>texture[8]/wrap-t</use></wrap-t>
<internal-format><use>texture[8]/internal-format</use></internal-format>
</texture-unit>
<blend>1</blend>
<rendering-hint>transparent</rendering-hint>
<cull-face><use>cull-face</use></cull-face>
<program>
<vertex-shader>Shaders/HDR/geometry-transparent.vert</vertex-shader>
<fragment-shader>Shaders/HDR/geometry-transparent.frag</fragment-shader>
<fragment-shader>Shaders/HDR/gbuffer-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/lighting-include.frag</fragment-shader>
<fragment-shader>Shaders/HDR/aerial-perspective-include.frag</fragment-shader>
</program>
<uniform>
<name>color_tex</name>
<type>sampler-2d</type>
<value type="int">0</value>
</uniform>
<uniform>
<name>color_mode</name>
<type>int</type>
<value><use>material/color-mode</use></value>
</uniform>
<uniform>
<name>material_diffuse</name>
<type>float-vec4</type>
<value><use>material/diffuse</use></value>
</uniform>
<!-- Lighting include -->
<uniform>
<name>dfg_lut</name>
<type>sampler-2d</type>
<value type="int">8</value>
</uniform>
<uniform>
<name>prefiltered_envmap</name>
<type>sampler-cube</type>
<value type="int">9</value>
</uniform>
<uniform>
<name>shadow_tex</name>
<type>sampler-2d-shadow</type>
<value type="int">10</value>
</uniform>
<!-- Aerial perspective include -->
<uniform>
<name>aerial_perspective_lut</name>
<type>sampler-2d</type>
<value type="int">11</value>
</uniform>
<uniform>
<name>transmittance_lut</name>
<type>sampler-2d</type>
<value type="int">12</value>
</uniform>
</pass>
</technique>
</PropertyList>

4
Shaders/HDR/geometry-combined.frag
View file

@ -10,6 +10,7 @@ in mat3 TBN;
uniform sampler2D color_tex;
uniform sampler2D normal_tex;
uniform int normalmap_enabled;
uniform int normalmap_dds;
uniform float normalmap_tiling;
const float DEFAULT_COMBINED_METALNESS = 0.0;
@ -26,6 +27,9 @@ void main()
vec3 normal = vec3(0.5, 0.5, 1.0);
if (normalmap_enabled > 0) {
normal = texture(normal_tex, texCoord * normalmap_tiling).rgb * 2.0 - 1.0;
// DDS has flipped normals
if (normalmap_dds > 0)
normal = -normal;
}
normal = normalize(TBN * normal);
gbuffer1 = encodeNormal(normal);

94
Shaders/HDR/geometry-transparent.frag Normal file
View file

@ -0,0 +1,94 @@
#version 330 core
out vec4 fragColor;
in vec3 normalVS;
in vec2 texCoord;
in vec4 materialColor;
in vec3 ecPos;
uniform sampler2D color_tex;
uniform float minimum_alpha = 0.0;
uniform mat4 osg_ViewMatrixInverse;
uniform vec4 fg_Viewport;
uniform vec3 fg_SunDirection;
const float DEFAULT_TRANSPARENT_ROUGHNESS = 0.1;
vec3 decodeSRGB(vec3 screenRGB);
vec3 getF0Reflectance(vec3 baseColor, float metallic);
float getShadowing(vec3 p, vec3 n, float NdotL);
vec3 evaluateLight(
vec3 baseColor,
float metallic,
float roughness,
float clearcoat,
float clearcoatRoughness,
vec3 f0,
vec3 intensity,
float occlusion,
vec3 n,
vec3 l,
vec3 v,
float NdotL,
float NdotV);
vec3 evaluateIBL(
vec3 baseColor,
float metallic,
float roughness,
vec3 f0,
float occlusion,
vec3 nWorldSpace,
float NdotV,
vec3 reflected);
vec3 addAerialPerspective(vec3 color, vec2 coord, float depth);
vec3 getSunIntensity();
void main()
{
vec4 baseColorTexel = texture(color_tex, texCoord);
vec3 baseColor = decodeSRGB(baseColorTexel.rgb) * materialColor.rgb;
// HACK: Force a minimum value to stay compatible with glass.eff
float alpha = max(materialColor.a * baseColorTexel.a, minimum_alpha);
vec3 n = normalize(normalVS);
vec3 v = normalize(-ecPos);
vec3 l = fg_SunDirection;
float NdotL = dot(n, l);
float NdotV = clamp(abs(dot(n, v)), 0.001, 1.0);
vec3 f0 = getF0Reflectance(baseColor.rgb, 0.0);
vec3 sunIlluminance = getSunIntensity() * clamp(NdotL, 0.0, 1.0);
float shadowFactor = getShadowing(ecPos, n, NdotL);
vec3 color = evaluateLight(baseColor,
0.0,
DEFAULT_TRANSPARENT_ROUGHNESS,
0.0,
0.0,
f0,
sunIlluminance,
shadowFactor,
n, l, v,
NdotL, NdotV);
vec3 worldNormal = (osg_ViewMatrixInverse * vec4(n, 0.0)).xyz;
vec3 worldReflected = (osg_ViewMatrixInverse * vec4(reflect(-v, n), 0.0)).xyz;
color += evaluateIBL(baseColor,
0.0,
DEFAULT_TRANSPARENT_ROUGHNESS,
f0,
1.0,
worldNormal,
NdotV,
worldReflected);
vec2 coord = (gl_FragCoord.xy - fg_Viewport.xy) / fg_Viewport.zw;
color = addAerialPerspective(color, coord, length(ecPos));
fragColor = vec4(color, alpha);
}

44
Shaders/HDR/geometry-transparent.vert Normal file
View file

@ -0,0 +1,44 @@
#version 330 core
#define MODE_OFF 0
#define MODE_DIFFUSE 1
#define MODE_AMBIENT_AND_DIFFUSE 2
layout(location = 0) in vec4 pos;
layout(location = 1) in vec3 normal;
layout(location = 2) in vec4 vertexColor;
layout(location = 3) in vec4 multiTexCoord0;
out vec3 normalVS;
out vec2 texCoord;
out vec4 materialColor;
out vec3 ecPos;
uniform int color_mode;
uniform vec4 material_diffuse;
uniform mat4 osg_ModelViewMatrix;
uniform mat4 osg_ModelViewProjectionMatrix;
uniform mat3 osg_NormalMatrix;
void main()
{
gl_Position = osg_ModelViewProjectionMatrix * pos;
normalVS = normalize(osg_NormalMatrix * normal);
texCoord = multiTexCoord0.st;
ecPos = (osg_ModelViewMatrix * pos).xyz;
// Legacy material handling
if (color_mode == MODE_DIFFUSE)
materialColor = vertexColor;
else if (color_mode == MODE_AMBIENT_AND_DIFFUSE)
materialColor = vertexColor;
else
materialColor = material_diffuse;
// Super hack: if diffuse material alpha is less than 1, assume a
// transparency animation is at work
if (material_diffuse.a < 1.0)
materialColor.a = material_diffuse.a;
else
materialColor.a = vertexColor.a;
}

5
Shaders/HDR/geometry.frag
View file

@ -6,6 +6,7 @@ layout(location = 2) out vec4 gbuffer2;
in vec3 normalVS;
in vec2 texCoord;
in vec4 materialColor;
uniform sampler2D color_tex;
@ -17,7 +18,9 @@ vec3 decodeSRGB(vec3 screenRGB);
void main()
{
gbuffer0.rgb = decodeSRGB(texture(color_tex, texCoord).rgb);
vec3 texel = texture(color_tex, texCoord).rgb;
vec3 color = decodeSRGB(texel) * materialColor.rgb; // Ignore transparency
gbuffer0.rgb = color;
gbuffer0.a = 1.0;
gbuffer1 = encodeNormal(normalVS);
gbuffer2 = vec4(DEFAULT_METALNESS,

17
Shaders/HDR/geometry.vert
View file

@ -1,11 +1,20 @@
#version 330 core
#define MODE_OFF 0
#define MODE_DIFFUSE 1
#define MODE_AMBIENT_AND_DIFFUSE 2
layout(location = 0) in vec4 pos;
layout(location = 1) in vec3 normal;
layout(location = 2) in vec4 vertexColor;
layout(location = 3) in vec4 multiTexCoord0;
out vec3 normalVS;
out vec2 texCoord;
out vec4 materialColor;
uniform int color_mode;
uniform vec4 material_diffuse;
uniform mat4 osg_ModelViewProjectionMatrix;
uniform mat3 osg_NormalMatrix;
@ -15,4 +24,12 @@ void main()
gl_Position = osg_ModelViewProjectionMatrix * pos;
normalVS = normalize(osg_NormalMatrix * normal);
texCoord = multiTexCoord0.st;
// Legacy material handling
if (color_mode == MODE_DIFFUSE)
materialColor = vertexColor;
else if (color_mode == MODE_AMBIENT_AND_DIFFUSE)
materialColor = vertexColor;
else
materialColor = material_diffuse;
}

6
Shaders/HDR/lighting-include.frag
View file

@ -149,9 +149,9 @@ float getShadowing(vec3 p, vec3 n, float NdotL)
vec4 lightSpacePos[4];
lightSpacePos[0] = getLightSpacePosition(p, n, NdotL, 0.05, fg_LightMatrix_csm0);
lightSpacePos[1] = getLightSpacePosition(p, n, NdotL, 0.2, fg_LightMatrix_csm1);
lightSpacePos[2] = getLightSpacePosition(p, n, NdotL, 1.0, fg_LightMatrix_csm2);
lightSpacePos[3] = getLightSpacePosition(p, n, NdotL, 5.0, fg_LightMatrix_csm3);
lightSpacePos[1] = getLightSpacePosition(p, n, NdotL, 0.1, fg_LightMatrix_csm1);
lightSpacePos[2] = getLightSpacePosition(p, n, NdotL, 0.5, fg_LightMatrix_csm2);
lightSpacePos[3] = getLightSpacePosition(p, n, NdotL, 1.0, fg_LightMatrix_csm3);
for (int i = 0; i < 4; ++i) {
// Map-based cascade selection