Implement shaders

[reminjp]

Currently the loader supports only a few properties of Unlit, MToon.

• VRMが提供するシェーダー
• UniVRMで使えるシェーダー

TODO

Unlit

• VRM/UnlitTexture
• VRM/UnlitCutout
• VRM/UnlitTransparent
• VRM/UnlitTransparentZWrite

MToon

Properties

• RenderType: Opaque | Cutout | Transparent | TransparentCutout
• uniform float _Cutoff
• uniform vec4 _Color
• uniform vec4 _ShadeColor
• uniform sampler2D _MainTex
• uniform sampler2D _ShadeTexture
• uniform float _BumpScale
• uniform sampler2D _BumpMap
• uniform float _ReceiveShadowRate
• uniform sampler2D _ReceiveShadowTexture
• uniform float _ShadeShift
• uniform float _ShadeToony
• uniform float _LightColorAttenuation
• uniform sampler2D _SphereAdd
• uniform vec4 _EmissionColor
• uniform sampler2D _EmissionMap
• uniform sampler2D _OutlineWidthTexture
• uniform float _OutlineWidth
• uniform float _OutlineScaledMaxDistance
• uniform vec4 _OutlineColor
• uniform float _OutlineLightingMix
• uniform int _DebugMode
• uniform int _BlendMode
• uniform int _OutlineWidthMode
• uniform int _OutlineColorMode
• uniform int _CullMode
• uniform int _OutlineCullMode
• uniform float _SrcBlend
• uniform float _DstBlend
• uniform int _ZWrite
• uniform int _IsFirstSetup