Singularity Shaders and a lot of Shader Stuff (#2517)

* Beginnings of singulo shader

* LOTS of changes!!

* Minor changes

* Singulo stuff

* Aesthetic changes to singulo

* Combining singulo change

* ShaderAura uses IEntities now, not IPlayerSession

* Fixes?

* Fixes draw order for atmos

* using fix

* Address reviews

* nuget.config whaaa

* nuget haha

* nuget why are you so dum

* happy now

* Preparing for omegachange

* Merge from seventh level of hell

* woork

* Ignorecomponents add

* mmf

* RobustToolbox?

* Fixes

* Fixes Robust?

* adds sprite

* Nullables

* Crit overlay stuff

* Commits Robust

Resources/Textures/Shaders/texture.swsl

@@ -0,0 +1,23 @@
+
+//Draws the given texture at the given screen coords. Useful in specific scenarios (i.e. this was made for drawing singularity sprites over the lensing effect but below FOV)
+//Currently does not work with AtlasTextures, going to need some work.
+
+uniform sampler2D tex;
+uniform highp vec2 positionInput = vec2(0,0);
+uniform highp vec2 pixelSize = vec2(32, 32); 
+uniform highp float alphaCutoff = 0.0;
+uniform bool removeTransparency = false;
+
+void fragment() {
+	float pixelLength = pixelSize.x*2;
+	float halvedLength = pixelLength/2;
+	if(FRAGCOORD.x > positionInput.x - halvedLength && FRAGCOORD.x < positionInput.x + halvedLength && FRAGCOORD.y > positionInput.y - halvedLength && FRAGCOORD.y < positionInput.y + halvedLength){
+		vec2 finalCoords = (FRAGCOORD.xy-positionInput+(pixelLength/2))/pixelLength;
+		vec4 color = texture(tex, finalCoords);
+		if(color.a > alphaCutoff){
+			if(removeTransparency)
+				color.a = 1.0;
+			COLOR = color;
+		}
+	}
+}