Initial commit

addons/Assets/Shader/ViewmodelSpace.gd

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+@tool
+extends ShaderSpace
+class_name ViewmodelSpace
+## This node will configure all meshes childed inside of it (recursively) to act without clipping through wall, useful for wieldable viewmodels to keep them in-front
+## 
+## Useful for viewmodels for wieldables. Can toggle the clipping behavior by setting `disable_viewmodel_clipping`
+
+var _viewmodel_clipping_disabled : bool = true
+
+## When this is checked, it will make it so any childed viewmodel will always be rendered in front of everything else
+@export var disable_viewmodel_clipping : bool = true:
+	get:
+		return _viewmodel_clipping_disabled
+	set(value):
+		_viewmodel_clipping_disabled = value
+		set_instance_shader_parameter("viewmodel_enabled", value)
+
+func _init():
+	injected_vars = '''
+	global uniform float viewmodel_fov = 75.0f;
+	instance uniform bool viewmodel_enabled = true;'''
+
+	injected_vertex = '''
+		UV = UV * uv1_scale.xy + uv1_offset.xy;
+	
+		/* begin shader magic*/
+		float onetanfov = 1.0f / tan(0.5f * (viewmodel_fov * PI / 180.0f));
+		float aspect = VIEWPORT_SIZE.x / VIEWPORT_SIZE.y;
+		// modify projection matrix to match FOV
+		PROJECTION_MATRIX[1][1] = -onetanfov;
+		PROJECTION_MATRIX[0][0] = onetanfov / aspect;
+		// this next part draws the viewmodel over everything (disable if you want dof near on viewmodel)
+			
+		POSITION = PROJECTION_MATRIX * MODELVIEW_MATRIX * vec4(VERTEX.xyz, 1.0);
+		
+		if(viewmodel_enabled){
+			POSITION.z = mix(POSITION.z, 0, -2.999);
+		}
+		/* end shader magic */
+	'''
+
+func convert_surfaces():
+	super()
+	if not _viewmodel_clipping_disabled:
+		set_instance_shader_parameter("viewmodel_enabled",_viewmodel_clipping_disabled)