a_dinosaur/CavesOfJolk-libgdx
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point lights

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a dinosaur
2023-08-18 04:48:22 +10:00
parent 20b42d7a32
commit 2a88f7d446
2 changed files with 45 additions and 8 deletions
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20
src/main/kotlin/Game.kt
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@ -11,6 +11,7 @@ import com.badlogic.gdx.graphics.g3d.attributes.FloatAttribute
import com.badlogic.gdx.graphics.g3d.attributes.IntAttribute
import com.badlogic.gdx.graphics.g3d.attributes.TextureAttribute
import com.badlogic.gdx.graphics.g3d.environment.DirectionalLight
import com.badlogic.gdx.graphics.g3d.environment.PointLight
import com.badlogic.gdx.graphics.g3d.model.data.*
import com.badlogic.gdx.graphics.g3d.shaders.DefaultShader
import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder
@ -152,13 +153,13 @@ class Game: ApplicationAdapter()
env = Environment()
env.set(
IntAttribute.createCullFace(GL20.GL_BACK),
ColorAttribute.createAmbientLight(XnaColor.DarkSlateGray.lighten(-0.6)),
ColorAttribute.createAmbientLight(XnaColor.DarkSlateGray.lighten(-0.666)),
ColorAttribute.createFog(XnaColor.CornflowerBlue))
env.set(
CustomIntAttribute.createFogMode(CustomIntAttribute.FogModes.Depth),
CustomIntAttribute.createFogType(CustomIntAttribute.FogTypes.Smooth),
CustomFloatAttribute.createFogNear(0.75f),
CustomFloatAttribute.createFogFar(20.5f))
CustomFloatAttribute.createFogNear(1.25f),
CustomFloatAttribute.createFogFar(24.5f))
/*
env.set(
CustomIntAttribute.createFogMode(CustomIntAttribute.FogModes.Distance),
@ -166,12 +167,21 @@ class Game: ApplicationAdapter()
CustomFloatAttribute.createFogDensity(0.1f))
*/
env.add(DirectionalLight().set(
XnaColor.BlanchedAlmond.lighten(0.01),
XnaColor.BlanchedAlmond.lighten(-0.02).mix(XnaColor.LightSlateGray, 0.5f).mix(XnaColor.White, 0.125f),
Vector3(1.0f, -1.0f, -1.0f).nor()))
env.add(PointLight().set(
XnaColor.Green.mix(XnaColor.Gray, 0.5f),
Vector3(3.0f, 0.33f, -5.0f), 2.0f))
env.add(PointLight().set(
XnaColor.Red.mix(XnaColor.Gray, 0.5f),
Vector3(5.5f, 0.33f, -6.0f), 2.0f))
env.add(PointLight().set(
XnaColor.Blue.mix(XnaColor.Gray, 0.5f),
Vector3(4.0f, 0.33f, -7.0f), 2.0f))
val shaderConfig = DefaultShader.Config()
shaderConfig.numDirectionalLights = 1
shaderConfig.numPointLights = 0
shaderConfig.numPointLights = 3
shaderConfig.numBones = 0
modelBatch = ModelBatch(CustomDefaultShaderProvider(shaderConfig))

33
src/main/resources/lit.frag.glsl
View File

@ -89,10 +89,10 @@ varying vec3 v_ambient;
#endif // lightingFlag
#if defined(specularFlag) || defined(fogFlag)
#if (numPointLights > 0) || defined(specularFlag) || defined(fogFlag)
varying vec4 v_worldPosition;
uniform vec4 u_cameraPosition;
#endif // lightingFlag || fogFlag
#endif // numPointLights > 0 || lightingFlag || fogFlag
#ifdef fogFlag
uniform vec4 u_fogColor;
@ -159,7 +159,7 @@ void main()
vec3 lightVec = -u_dirLights[i].direction;
float lambert = dot(normal, lightVec);
float phongTerm = max(lambert, 0.0);
vec3 value = u_dirLights[i].color * phongTerm;
vec3 value = u_dirLights[i].color;
value = linearEncode(value);
value *= phongTerm;
accum += value;
@ -172,6 +172,32 @@ void main()
}
#endif // normalFlag && numDirectionalLights
#if defined(normalFlag) && (numPointLights > 0)
for (int i = 0; i < numPointLights; ++i)
{
vec3 lightVec = u_pointLights[i].position - v_worldPosition.xyz;
float lightDist2 = dot(lightVec, lightVec);
vec3 lightDir = lightVec;
lightDir *= inversesqrt(lightDist2);
float lambert = dot(normal, lightDir);
float phongTerm = max(lambert, 0.0);
//float lightDist = sqrt(lightDist2);
//float attenuation = clamp(1.0 - lightDist * lightDist / (2.0 * 2.0), 0.0, 1.0);
//attenuation *= attenuation;
float attenuation = 1.0 / (1.0 + lightDist2);
vec3 value = u_pointLights[i].color;
value = linearEncode(value);
value *= phongTerm * attenuation;
accum += value;
#ifdef specularFlag
vec3 halfDir = normalize(lightDir + eyeVec);
float specAngle = max(dot(halfDir, normal), 0.0);
float specTerm = pow(specAngle, u_shininess);
specAccum += value * specTerm;
#endif // specularFlag
}
#endif
vec3 fragment;
#ifdef specularFlag
#ifdef specularTextureFlag
@ -229,5 +255,6 @@ void main()
fogColor = linearEncode(fogColor);
fragment = mix(fragment, fogColor, fog);
#endif // fogFlag
gl_FragColor = vec4(linearDecode(fragment), diffuse.a);
}