Rendering update

scenes/main_render.gdshader

@@ -0,0 +1,35 @@
+shader_type canvas_item;
+
+uniform float color_steps:hint_range(1.0, 255.0, 1.0);
+uniform float color_min:hint_range(0.0, 1.0, 0.01) = 0;
+uniform float color_max:hint_range(0.0, 1.0, 0.01) = 1;
+uniform sampler2D color_curve;
+
+void vertex() {
+	// Called for every vertex the material is visible on.
+}
+
+void fragment() {
+	vec2 texSize = vec2(textureSize(TEXTURE,0)); // For performance reasons, this function should be avoided as it always performs a full texture read. When possible, you should pass the texture size as a uniform instead.
+	texSize = texSize / 4.;
+	ivec2 intUv = ivec2(texSize * UV);
+	vec2 flooredUv = vec2(intUv) / texSize;
+	vec3 fullColor = texture(TEXTURE,flooredUv).rgb;
+	//vec3 strechedColor = (fullColor - color_min) / color_max;
+	vec3 strechedColor = vec3(
+		texture(color_curve,vec2(fullColor.r,0)).r,
+		texture(color_curve,vec2(fullColor.g,0)).r,
+		texture(color_curve,vec2(fullColor.b,0)).r);
+	vec3 scaledColor = strechedColor * color_steps;
+	vec3 roundColor = round(scaledColor);
+	vec3 backScaledColor = roundColor / color_steps;
+	COLOR = vec4(backScaledColor,1);
+	//COLOR = vec4(flooredUv,0,1);
+	//COLOR = vec4(vec3(float(textureQueryLevels(TEXTURE)/1)),1);
+	//COLOR = vec4(1,0,0,1);
+}
+
+//void light() {
+//	// Called for every pixel for every light affecting the CanvasItem.
+//	// Uncomment to replace the default light processing function with this one.
+//}