Skip to main content

Function: createTerrainRenderEcsSystem()

createTerrainRenderEcsSystem(renderContext, terrainMesh): EcsSystem<[CameraEcsComponent, PositionEcsComponent]>

Defined in: rendering/terrain/create-terrain-render-ecs-system.ts:25

Creates an ECS system that draws terrainMesh directly - a single, non-instanced gl.drawArrays call against its own geometry and material

  • rather than going through the sprite pipeline createRenderEcsSystem batches (which only knows how to draw quads). Register it before createRenderEcsSystem, with renderContext.clearStrategy set to CLEAR_STRATEGY.none, so this system's own clear is the only one each frame - createRenderEcsSystem's would otherwise wipe the terrain right before drawing sprites on top of it.

Assumes a single camera rendering straight to the canvas; a multi-camera setup would need to track which destinations have already been cleared this frame, the way createRenderEcsSystem does internally.

Parameters​

renderContext​

RenderContext

The render context to draw into.

terrainMesh​

TerrainMesh

The terrain mesh built by createTerrainMesh.

Returns​

EcsSystem<[CameraEcsComponent, PositionEcsComponent]>