提交Spine插件

Assets/Spine/Runtime/spine-unity/Modules/Shaders/Sprite/CGIncludes/ShaderMaths.cginc

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+#ifndef SHADER_MATHS_INCLUDED
+#define SHADER_MATHS_INCLUDED
+
+#include "UnityCG.cginc"
+
+////////////////////////////////////////
+// Maths functions
+//
+
+inline half3 safeNormalize(half3 inVec)
+{
+	half dp3 = max(0.001f, dot(inVec, inVec));
+	return inVec * rsqrt(dp3);
+}
+
+inline float dotClamped(float3 a, float3 b)
+{
+	#if (SHADER_TARGET < 30 || defined(SHADER_API_PS3))
+		return saturate(dot(a, b));
+	#else
+		return max(0.0h, dot(a, b));
+	#endif
+}
+
+inline float oneDividedBy(float value)
+{
+	//Catches NANs
+	float sign_value = sign(value);
+	float sign_value_squared = sign_value*sign_value;
+	return sign_value_squared / ( value + sign_value_squared - 1.0);
+}
+
+inline half pow5 (half x)
+{
+	return x*x*x*x*x;
+}
+
+inline float4 quat_from_axis_angle(float3 axis, float angleRadians)
+{ 
+  float4 qr;
+  float half_angle = (angleRadians * 0.5);
+  qr.x = axis.x * sin(half_angle);
+  qr.y = axis.y * sin(half_angle);
+  qr.z = axis.z * sin(half_angle);
+  qr.w = cos(half_angle);
+  return qr;
+}
+
+inline float3 rotate_vertex_position(float3 position, float3 axis, float angleRadians)
+{ 
+  float4 q = quat_from_axis_angle(axis, angleRadians);
+  float3 v = position.xyz;
+  return v + 2.0 * cross(q.xyz, cross(q.xyz, v) + q.w * v);
+}
+
+float3 EncodeFloatRGB(float value)
+{
+   const float max24int = 256*256*256-1;
+   float3 decomp = floor( value * float3( max24int/(256*256), max24int/256, max24int ) ) / 255.0;
+   decomp.z -= decomp.y * 256.0;
+   decomp.y -= decomp.x * 256.0;
+   return decomp;
+}
+
+float DecodeFloatRGB(float3 decomp)
+{
+   return dot( decomp.xyz, float3( 255.0/256, 255.0/(256*256), 255.0/(256*256*256) ) );
+}
+
+#endif // SHADER_MATHS_INCLUDED