From eb84bb298d2b95aec7b2ae12cbf25ac64f25379a Mon Sep 17 00:00:00 2001
From: tylermurphy534 <tylermurphy534@gmail.com>
Date: Sun, 6 Nov 2022 15:12:42 -0500
Subject: move to self host

---
 .../Shaders/Includes/CGI_PoiMath.cginc             | 78 ++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiMath.cginc

(limited to 'VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiMath.cginc')

diff --git a/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiMath.cginc b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiMath.cginc
new file mode 100644
index 00000000..98af2364
--- /dev/null
+++ b/VRCSDK3AvatarsLegacy/Assets/_PoiyomiShaders/Shaders/Includes/CGI_PoiMath.cginc
@@ -0,0 +1,78 @@
+#ifndef POI_MATH
+    #define POI_MATH
+    
+    #ifndef pi
+        #define pi float(3.14159265359)
+    #endif
+    
+    float4 quaternion_conjugate(float4 v)
+    {
+        return float4(
+            v.x, -v.yzw
+        );
+    }
+    
+    float4 quaternion_mul(float4 v1, float4 v2)
+    {
+        float4 result1 = (v1.x * v2 + v1 * v2.x);
+        
+        float4 result2 = float4(
+            - dot(v1.yzw, v2.yzw),
+            cross(v1.yzw, v2.yzw)
+        );
+        
+        return float4(result1 + result2);
+    }
+    
+    // angle : radians
+    float4 get_quaternion_from_angle(float3 axis, float angle)
+    {
+        return float4(
+            cos(angle / 2.0),
+            normalize(axis) * sin(angle / 2.0)
+        );
+    }
+    
+    float4 quaternion_from_vector(float3 inVec)
+    {
+        return float4(0.0, inVec);
+    }
+    
+    float degree_to_radius(float degree)
+    {
+        return(
+            degree / 180.0 * pi
+        );
+    }
+    
+    float3 rotate_with_quaternion(float3 inVec, float3 rotation)
+    {
+        float4 qx = get_quaternion_from_angle(float3(1, 0, 0), degree_to_radius(rotation.x));
+        float4 qy = get_quaternion_from_angle(float3(0, 1, 0), degree_to_radius(rotation.y));
+        float4 qz = get_quaternion_from_angle(float3(0, 0, 1), degree_to_radius(rotation.z));
+        
+        #define MUL3(A, B, C) quaternion_mul(quaternion_mul((A), (B)), (C))
+        float4 quaternion = normalize(MUL3(qx, qy, qz));
+        float4 conjugate = quaternion_conjugate(quaternion);
+        
+        float4 inVecQ = quaternion_from_vector(inVec);
+        
+        float3 rotated = (
+            MUL3(quaternion, inVecQ, conjugate)
+        ).yzw;
+        
+        return rotated;
+    }
+    
+    float4 transform(float4 input, float4 pos, float4 rotation, float4 scale)
+    {
+        input.rgb *= (scale.xyz * scale.w);
+        input = float4(
+            rotate_with_quaternion(input.xyz, rotation.xyz * rotation.w)
+        + (pos.xyz * pos.w),
+        input.w
+        );
+        return input;
+    }
+    
+#endif
\ No newline at end of file
-- 
cgit v1.2.3-freya