135 lines
3.4 KiB
JavaScript
135 lines
3.4 KiB
JavaScript
/**
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* MMD Toon Shader
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*
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* This shader is extended from MeshPhongMaterial, and merged algorithms with
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* MeshToonMaterial and MeshMetcapMaterial.
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* Ideas came from https://github.com/mrdoob/three.js/issues/19609
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*
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* Combining steps:
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* * Declare matcap uniform.
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* * Add gradientmap_pars_fragment.
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* * Use gradient irradiances instead of dotNL irradiance from MeshPhongMaterial.
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* (Replace lights_phong_pars_fragment with lights_mmd_toon_pars_fragment)
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* * Add mmd_toon_matcap_fragment.
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*/
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import { UniformsUtils, ShaderLib } from 'three';
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const lights_mmd_toon_pars_fragment = /* glsl */`
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varying vec3 vViewPosition;
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struct BlinnPhongMaterial {
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vec3 diffuseColor;
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vec3 specularColor;
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float specularShininess;
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float specularStrength;
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};
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void RE_Direct_BlinnPhong( const in IncidentLight directLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {
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vec3 irradiance = getGradientIrradiance( geometryNormal, directLight.direction ) * directLight.color;
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reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );
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reflectedLight.directSpecular += irradiance * BRDF_BlinnPhong( directLight.direction, geometryViewDir, geometryNormal, material.specularColor, material.specularShininess ) * material.specularStrength;
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}
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void RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {
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reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );
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}
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#define RE_Direct RE_Direct_BlinnPhong
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#define RE_IndirectDiffuse RE_IndirectDiffuse_BlinnPhong
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`;
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const mmd_toon_matcap_fragment = /* glsl */`
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#ifdef USE_MATCAP
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vec3 viewDir = normalize( vViewPosition );
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vec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );
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vec3 y = cross( viewDir, x );
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vec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5; // 0.495 to remove artifacts caused by undersized matcap disks
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vec4 matcapColor = texture2D( matcap, uv );
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#ifdef MATCAP_BLENDING_MULTIPLY
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outgoingLight *= matcapColor.rgb;
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#elif defined( MATCAP_BLENDING_ADD )
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outgoingLight += matcapColor.rgb;
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#endif
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#endif
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`;
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const MMDToonShader = {
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name: 'MMDToonShader',
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defines: {
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TOON: true,
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MATCAP: true,
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MATCAP_BLENDING_ADD: true,
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},
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uniforms: UniformsUtils.merge( [
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ShaderLib.toon.uniforms,
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ShaderLib.phong.uniforms,
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ShaderLib.matcap.uniforms,
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] ),
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vertexShader:
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ShaderLib.phong.vertexShader
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.replace(
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'#include <envmap_pars_vertex>',
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''
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)
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.replace(
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'#include <envmap_vertex>',
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''
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),
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fragmentShader:
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ShaderLib.phong.fragmentShader
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.replace(
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'#include <common>',
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`
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#ifdef USE_MATCAP
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uniform sampler2D matcap;
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#endif
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#include <common>
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`
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)
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.replace(
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'#include <envmap_common_pars_fragment>',
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`
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#include <gradientmap_pars_fragment>
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`
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)
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.replace(
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'#include <envmap_pars_fragment>',
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''
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)
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.replace(
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'#include <lights_phong_pars_fragment>',
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lights_mmd_toon_pars_fragment
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)
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.replace(
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'#include <envmap_fragment>',
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`
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${mmd_toon_matcap_fragment}
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`
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)
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};
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export { MMDToonShader };
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