Added VFEZ

VFEZ/Shaders/Effects/vfez_alpha_disolve.gdshaderinc

@@ -0,0 +1,67 @@
+#ifndef VFEZ_UTILS
+	#include "vfez_utils.gdshaderinc"
+	#define VFEZ_UTILS
+#endif
+
+group_uniforms alpha_disolve;
+uniform sampler2D alpha_disolve_texture: source_color;
+uniform vec2 alpha_disolve_texture_scale = vec2(1.);
+uniform vec2 alpha_disolve_texture_offset = vec2(0.);
+uniform float alpha_disolve_amount: hint_range(-0.1, 1) = -0.1;
+uniform float alpha_disolve_transition: hint_range(0.01, 0.75)= 0.075;
+uniform float alpha_disolve_power: hint_range(0.001, 10) = 1;
+uniform vec2 alpha_disolve_scroll_speed;
+group_uniforms;
+
+// disolve burn
+group_uniforms alpha_disolve.disolve_burn;
+uniform bool use_alpha_disolve_burn = false;
+uniform sampler2D alpha_disolve_burn_texture: source_color;
+uniform vec3 alpha_disolve_burn_color: source_color = vec3(1., 1., 0.);
+uniform float alpha_disolve_burn_width: hint_range(0.0, 0.2) = 0.01;
+uniform float alpha_disolve_burn_glow: hint_range(1, 250) = 5;
+group_uniforms;
+
+vec4 alpha_disolve(
+	vec4 color,
+	float pre_disolve_alpha,
+	float base_a,
+	vec2 uv,
+	bool fract_uv)
+{
+	vec2 disolve_uv = transform_uv(uv, alpha_disolve_texture_scale, alpha_disolve_texture_offset, fract_uv);
+
+	float disolve_amount = clamp(alpha_disolve_amount + (1. - base_a), 0., 1.);
+	float disolve_transition = max(0.01, alpha_disolve_transition * ease_out_quint(disolve_amount));
+	disolve_uv += mod(TIME * alpha_disolve_scroll_speed, 1.0);
+	disolve_amount = clamp(pow(disolve_amount, alpha_disolve_power), 0., 1.);
+	float disolve_sample = texture(alpha_disolve_texture, disolve_uv).r;
+	float disolve = clamp(
+		smoothstep(
+				0.0,
+				disolve_transition,
+				remap_float(1.0 - disolve_amount, 0.0, 1.0, -1.0, 1.0) + disolve_sample
+		), 0., 1.);
+
+	color.a *= disolve;
+
+	if (use_alpha_disolve_burn)
+	{
+		float disolve_burn = clamp(
+				smoothstep(
+					0.,
+					disolve_transition + alpha_disolve_burn_width,
+					remap_float(1.0 - disolve_amount, 0.0, 1.0, -1.0, 1.0) + disolve_sample
+				), 0., 1.
+			);
+
+		disolve_burn = disolve - disolve_burn;
+		vec3 disolve_burn_color = alpha_disolve_burn_color.rgb * alpha_disolve_burn_glow;
+
+		color.rgb += disolve_burn *
+				texture(alpha_disolve_burn_texture, disolve_uv).rgb
+				* disolve_burn_color.rgb
+				* pre_disolve_alpha;
+	}
+	return color;
+}