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Water: distortions

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This commit is contained in:
Sergey Lapin
2025-09-08 09:46:16 +03:00
parent d42cf2854a
commit 3f59a384e4
4 changed files with 20 additions and 6 deletions
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3
src/gamedata/WaterModule.cpp
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@@ -233,7 +233,7 @@ WaterModule::WaterModule(flecs::world &ecs)
texture_unit2->setTextureFiltering(
Ogre::FT_MAG, Ogre::FO_LINEAR);
texture_unit2->setTextureFiltering(
Ogre::FT_MIP, Ogre::FO_NONE);
Ogre::FT_MIP, Ogre::FO_LINEAR);
#if 0
bool success =
Ogre::RTShader::ShaderGenerator::getSingletonPtr()
@@ -267,6 +267,7 @@ WaterModule::WaterModule(flecs::world &ecs)
.getByName("Water/Above");
mat->load();
#endif
mat->load();
mat->setReceiveShadows(false);
/*
auto mat2 =

17
water/water.frag
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@@ -6,14 +6,21 @@ SAMPLER2D(noiseMap, 1);
#if NEW_WATER_SHADER
MAIN_PARAMETERS
IN(vec4 clipSpace, TEXCOORD0)
IN(vec2 textureCoords, TEXCOORD1)
MAIN_DECLARATION
{
// vec2 ndc = gl_FragCoord.xy / viewportSize.xy;
vec2 ndc = clipSpace.xy / clipSpace.w / 2.0 + vec2(0.5, 0.5);
vec2 reflectionUV = vec2(ndc.x, 1.0 - ndc.y) * 0.5;
vec2 refractionUV = vec2(ndc.x, 1.0 - ndc.y) * 0.5 + vec2(0.5, 0.0);
vec4 reflectionColour = texture2D(reflectMap, reflectionUV);
vec4 refractionColour = texture2D(reflectMap, refractionUV);
vec2 distortion1 = texture2D(noiseMap, textureCoords).rg * 2.0 - vec2(1.0, 1.0);
vec2 distortion2 = texture2D(noiseMap, textureCoords * 5.0 + vec2(10202.0, 221.0)).rg * 2.0 - vec2(1.0, 1.0);
vec2 distortion3 = texture2D(noiseMap, textureCoords * 10.0 + vec2(1302.0, 721.0)).rg * 2.0 - vec2(1.0, 1.0);
vec2 reflectionUV = (vec2(ndc.x, 1.0 - ndc.y) + distortion1 * 0.035 + distortion2 * 0.02 + distortion3 * 0.01);
vec2 refractionUV = (vec2(ndc.x, 1.0 - ndc.y) + distortion1 * 0.035 + distortion2 * 0.02 + distortion3 * 0.01);
reflectionUV.x = clamp(reflectionUV.x, 0.001, 0.999);
reflectionUV.y = clamp(reflectionUV.y, 0.001, 0.999);
refractionUV.x = clamp(refractionUV.x, 0.001, 0.999);
refractionUV.y = clamp(refractionUV.y, 0.001, 0.999);
vec4 reflectionColour = texture2D(reflectMap, reflectionUV * 0.5);
vec4 refractionColour = texture2D(reflectMap, refractionUV * 0.5 + vec2(0.5, 0.0));
gl_FragColor = mix(reflectionColour, refractionColour, 0.5);
}
#else

2
water/water.program
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@@ -91,6 +91,8 @@ fragment_program Water/water_fp glsl glsles glslang hlsl
source water.frag
default_params
{
param_named reflectMap int 0
param_named noiseMap int 1
}
preprocessor_defines NEW_WATER_SHADER
}

4
water/water.vert
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@@ -28,13 +28,17 @@ uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
uniform mat4 modelMatrix;
)
const float tiling = 0.012;
MAIN_PARAMETERS
IN(vec4 position, POSITION)
OUT(vec4 clipSpace, TEXCOORD0)
OUT(vec2 textureCoords, TEXCOORD1)
MAIN_DECLARATION
{
clipSpace = projectionMatrix * viewMatrix * modelMatrix * vec4(position.xyz, 1.0);
vec4 worldPos = modelMatrix * vec4(position.xyz, 1.0);
gl_Position = clipSpace;
textureCoords = vec2(worldPos.x / 2.0 + 0.5, worldPos.z / 2.0 + 0.5) * tiling;
}
#else