stepAngleをCPU側で計算してから転送する

Author: Mr-Ojii

script/RotBlur_M.anm

@@ -49,7 +49,7 @@ if GLShaderKit.isInitialized() then
     GLShaderKit.setShader(shader_path, reload)
     GLShaderKit.setFloat("resolution", w, h)
     GLShaderKit.setFloat("pivot", x + w * 0.5, y + h * 0.5)
-    GLShaderKit.setFloat("amount", amount)
+    GLShaderKit.setFloat("stepAngle", amount / quality)
     GLShaderKit.setFloat("rPos", amount * r_pos)
     GLShaderKit.setInt("quality", quality)
     GLShaderKit.setTexture2D(0, data, w, h)

script/RotBlur_M.frag

@@ -5,7 +5,7 @@ in vec2 TexCoord;
 layout(location = 0) out vec4 FragColor;
 
 uniform sampler2D texture0;
-uniform float amount;
+uniform float stepAngle;
 uniform int quality;
 uniform vec2 resolution;
 uniform vec2 pivot;
@@ -15,7 +15,6 @@ mat2 rot_mat(float angle) { return mat2(cos(angle), -sin(angle), sin(angle), cos
 
 void main() {
     vec4 color = vec4(0);
-	float stepAngle = amount / quality;
 	mat2 rot1 = rot_mat(stepAngle);
 	mat2 rot2 = rot_mat(-stepAngle);
 	vec2 uv1 = (TexCoord * resolution - pivot) * rot_mat(rPos);