Differential D5665 Diff 17780 source/blender/gpu/shaders/gpu_shader_2D_edituvs_stretch_vert.glsl

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source/blender/gpu/shaders/gpu_shader_2D_edituvs_stretch_vert.glsl


uniform mat4 ModelViewProjectionMatrix;		uniform mat4 ModelViewProjectionMatrix;
uniform vec2 aspect;		uniform vec2 aspect;

in vec2 pos;		in vec2 pos;

#ifndef STRETCH_ANGLE		#ifdef STRETCH_ANGLE
in float stretch;
#else

in vec2 uv_angles;		in vec2 uv_angles;
in float angle;		in float angle;

		#else
		in float ratio;
		uniform float totalAreaRatio;
		uniform float totalAreaRatioInv;

#endif		#endif

noperspective out vec4 finalColor;		noperspective out vec4 finalColor;

vec3 weight_to_rgb(float weight)		vec3 weight_to_rgb(float weight)
{		{
vec3 r_rgb;		vec3 r_rgb;
float blend = ((weight / 2.0) + 0.5);		float blend = ((weight / 2.0) + 0.5);
▲ Show 20 Lines • Show All 43 Lines • ▼ Show 20 Lines	float angle_normalized_v2v2(vec2 v1, vec2 v2)
v2 = normalize(v2 * aspect);		v2 = normalize(v2 * aspect);
/* this is the same as acos(dot_v3v3(v1, v2)), but more accurate */		/* this is the same as acos(dot_v3v3(v1, v2)), but more accurate */
bool q = (dot(v1, v2) >= 0.0);		bool q = (dot(v1, v2) >= 0.0);
vec2 v = (q) ? (v1 - v2) : (v1 + v2);		vec2 v = (q) ? (v1 - v2) : (v1 + v2);
float a = 2.0 * asin(length(v) / 2.0);		float a = 2.0 * asin(length(v) / 2.0);
return (q) ? a : M_PI - a;		return (q) ? a : M_PI - a;
}		}

		float area_ratio_to_stretch(float ratio, float tot_ratio, float inv_tot_ratio)
		{
		ratio *= (ratio > 0.0f) ? tot_ratio : -inv_tot_ratio;
		return (ratio > 1.0f) ? (1.0f / ratio) : ratio;
		}

void main()		void main()
{		{
gl_Position = ModelViewProjectionMatrix * vec4(pos, 0.0, 1.0);		gl_Position = ModelViewProjectionMatrix * vec4(pos, 0.0, 1.0);

#ifdef STRETCH_ANGLE		#ifdef STRETCH_ANGLE
vec2 v1 = angle_to_v2(uv_angles.x * M_PI);		vec2 v1 = angle_to_v2(uv_angles.x * M_PI);
vec2 v2 = angle_to_v2(uv_angles.y * M_PI);		vec2 v2 = angle_to_v2(uv_angles.y * M_PI);
float uv_angle = angle_normalized_v2v2(v1, v2) / M_PI;		float uv_angle = angle_normalized_v2v2(v1, v2) / M_PI;
float stretch = 1.0 - abs(uv_angle - angle);		float stretch = 1.0 - abs(uv_angle - angle);
stretch = stretch;		stretch = stretch;
stretch = 1.0 - stretch * stretch;		stretch = 1.0 - stretch * stretch;
		#else
		float stretch = 1.0 - area_ratio_to_stretch(ratio, totalAreaRatio, -totalAreaRatioInv);

#endif		#endif

finalColor = vec4(weight_to_rgb(stretch), 1.0);		finalColor = vec4(weight_to_rgb(stretch), 1.0);
}		}