Scale line-width to match zoom.

OpenRA.FileFormats/Graphics/IGraphicsDevice.cs

@@ -48,6 +48,7 @@ namespace OpenRA.FileFormats.Graphics
 
 		void DrawPrimitives( PrimitiveType type, int firstVertex, int numVertices );
 
+		void SetLineWidth( float width );
 		void EnableScissor( int left, int top, int width, int height );
 		void DisableScissor();
 	}

OpenRA.Game/Graphics/LineRenderer.cs

@@ -15,6 +15,8 @@ namespace OpenRA.Graphics
 {
 	public class LineRenderer : Renderer.IBatchRenderer
 	{
+		public float LineWidth = 1f;
+
 		Renderer renderer;
 		IShader shader;
 
@@ -35,6 +37,7 @@ namespace OpenRA.Graphics
 				{
 					var vb = renderer.GetTempVertexBuffer();
 					vb.SetData( vertices, nv );
+					renderer.SetLineWidth(LineWidth);
 					renderer.DrawBatch( vb,	0, nv, PrimitiveType.LineList );
 				} );
 

OpenRA.Game/Graphics/Renderer.cs

@@ -77,9 +77,11 @@ namespace OpenRA.Graphics
 		{
 			device.Clear(Color.Black);
 
+			WorldLineRenderer.LineWidth = zoom;
 			float2 r1 = new float2(2f/Resolution.Width, -2f/Resolution.Height);
 			float2 r2 = new float2(-1, 1);
 			var zr1 = zoom*r1;
+
 			SetShaderParams( WorldSpriteShader, zr1, r2, scroll );
 			SetShaderParams( WorldLineShader, zr1, r2, scroll );
 			SetShaderParams( LineShader, r1, r2, scroll );
@@ -116,6 +118,11 @@ namespace OpenRA.Graphics
 			CurrentBatchRenderer = null;
 		}
 
+		public void SetLineWidth(float width)
+		{
+			device.SetLineWidth(width);
+		}
+
 		static IGraphicsDevice device;
 
 		public static Size Resolution { get { return device.WindowSize; } }

OpenRA.Renderer.Cg/GraphicsDevice.cs

@@ -135,6 +135,12 @@ namespace OpenRA.Renderer.Cg
 			throw new NotImplementedException();
 		}
 
+		public void SetLineWidth( float width )
+		{
+			Gl.glLineWidth(width);
+			ErrorHandler.CheckGlError();
+		}
+
 		public IVertexBuffer<Vertex> CreateVertexBuffer( int size ) { return new VertexBuffer<Vertex>( size ); }
 		public ITexture CreateTexture() { return new Texture(); }
 		public ITexture CreateTexture( Bitmap bitmap ) { return new Texture( bitmap ); }

OpenRA.Renderer.Gl/GraphicsDevice.cs

@@ -115,6 +115,12 @@ namespace OpenRA.Renderer.Glsl
 			throw new NotImplementedException();
 		}
 
+		public void SetLineWidth( float width )
+		{
+			Gl.glLineWidth(width);
+			ErrorHandler.CheckGlError();
+		}
+
 		public IVertexBuffer<Vertex> CreateVertexBuffer( int size ) { return new VertexBuffer<Vertex>( size ); }
 		public ITexture CreateTexture() { return new Texture(); }
 		public ITexture CreateTexture( Bitmap bitmap ) { return new Texture( bitmap ); }

OpenRA.Renderer.Null/NullGraphicsDevice.cs

@@ -48,6 +48,7 @@ namespace OpenRA.Renderer.Null
 		}
 
 		public void DrawPrimitives(PrimitiveType pt, int firstVertex, int numVertices) { }
+		public void SetLineWidth( float width ) { }
 
 		public IVertexBuffer<Vertex> CreateVertexBuffer(int size) { return new NullVertexBuffer<Vertex>(); }
 		public ITexture CreateTexture() { return new NullTexture(); }