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Pass depth scale factors to vertex shaders.

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This commit is contained in:
Paul Chote
2015-10-01 18:55:54 +01:00
parent c00ef40151
commit dabea59b7d
7 changed files with 61 additions and 19 deletions
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25
OpenRA.Game/Renderer.cs
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@@ -40,6 +40,9 @@ namespace OpenRA
SheetBuilder fontSheetBuilder;
float depthScale;
float depthOffset;
Size? lastResolution;
int2? lastScroll;
float? lastZoom;
@@ -102,6 +105,20 @@ namespace OpenRA
}
}
public void InitializeDepthBuffer(MapGrid mapGrid)
{
// The depth buffer needs to be initialized with enough range to cover:
// - the height of the screen
// - the z-offset of tiles from MaxTerrainHeight below the bottom of the screen (pushed into view)
// - additional z-offset from actors on top of MaxTerrainHeight terrain
// - a small margin so that tiles rendered partially above the top edge of the screen aren't pushed behind the clip plane
// We need an offset of mapGrid.MaximumTerrainHeight * mapGrid.TileSize.Height / 2 to cover the terrain height
// and choose to use mapGrid.MaximumTerrainHeight * mapGrid.TileSize.Height / 4 for each of the actor and top-edge cases
this.depthScale = mapGrid == null || !mapGrid.EnableDepthBuffer ? 0 :
(float)Resolution.Height / (Resolution.Height + mapGrid.TileSize.Height * mapGrid.MaximumTerrainHeight);
this.depthOffset = this.depthScale / 2;
}
public void BeginFrame(int2 scroll, float zoom)
{
Device.Clear();
@@ -115,8 +132,8 @@ namespace OpenRA
if (resolutionChanged)
{
lastResolution = Resolution;
RgbaSpriteRenderer.SetViewportParams(Resolution, 1f, int2.Zero);
SpriteRenderer.SetViewportParams(Resolution, 1f, int2.Zero);
RgbaSpriteRenderer.SetViewportParams(Resolution, 0f, 0f, 1f, int2.Zero);
SpriteRenderer.SetViewportParams(Resolution, 0f, 0f, 1f, int2.Zero);
RgbaColorRenderer.SetViewportParams(Resolution, 1f, int2.Zero);
}
@@ -125,8 +142,8 @@ namespace OpenRA
{
lastScroll = scroll;
lastZoom = zoom;
WorldRgbaSpriteRenderer.SetViewportParams(Resolution, zoom, scroll);
WorldSpriteRenderer.SetViewportParams(Resolution, zoom, scroll);
WorldRgbaSpriteRenderer.SetViewportParams(Resolution, depthScale, depthOffset, zoom, scroll);
WorldSpriteRenderer.SetViewportParams(Resolution, depthScale, depthOffset, zoom, scroll);
WorldVoxelRenderer.SetViewportParams(Resolution, zoom, scroll);
WorldRgbaColorRenderer.SetViewportParams(Resolution, zoom, scroll);
}