UITKMeshDrawSink

ClassChartGuruChartGuru

public class UITKMeshDrawSink : IChartDrawSink

ChartGuru.IChartDrawSink that writes into a UI Toolkit UnityEngine.UIElements.MeshGenerationContext. Accepts the full ChartGuru.DrawTopology surface by internally wrapping itself in a ChartGuru.TopologyAdapter so the renderer can emit quads, line lists, and line strips even though UnityEngine.UIElements.MeshGenerationContext only accepts indexed triangles.

The sink keeps a CPU-side transform stack (`ChartGuru.UITKMeshDrawSink.PushTransform(UnityEngine.Matrix4x4)` / `ChartGuru.UITKMeshDrawSink.PopTransform`) matching GL.MultMatrix semantics and applies a Y-flip at vertex emission so the chart's bottom-left coordinate system maps to UI Toolkit's top-left origin. Batches are flushed per `ChartGuru.UITKMeshDrawSink.Begin(ChartGuru.DrawTopology%2cChartGuru.DrawMaterial)`/`ChartGuru.UITKMeshDrawSink.End` pair into a single MeshGenerationContext.Allocate(int, int) call.

The v1 pipeline does not support the full 720+ primitive sites of the existing `ChartGuru.ChartRenderer` - those still emit through GL. [ChartGuru.ChartGuruElement](/tools/chartguru/api/chartguru-chartguruelement/) therefore uses a camera-backed `UnityEngine.RenderTexture` blit as the v1 rendering strategy and only opens this sink at the top of its generateVisualContent callback to paint a single textured quad. Once the inner sites are migrated, the same sink carries native geometry.

Constructors

UITKMeshDrawSink()

public UITKMeshDrawSink()

Methods

Configure(MeshGenerationContext, Vector2, float)

public UITKMeshDrawSink Configure(MeshGenerationContext ctx, Vector2 contentSize, float lineWidth = 1)

Binds the sink to a live UnityEngine.UIElements.MeshGenerationContext. Must be called at the top of the generateVisualContent callback before routing the renderer through this sink.

Parameters

Name	Type
ctx	UnityEngine.UIElements.MeshGenerationContext
contentSize	UnityEngine.Vector2
lineWidth	System.Single

Returns

ChartGuru.UITKMeshDrawSink

EmitTexturedQuad(Texture, Rect, Color)

public void EmitTexturedQuad(Texture texture, Rect rectPoints, Color tint)

Optional convenience: emit a single textured quad covering the content rect. Used by ChartGuru.ChartGuruElement’s v1 RT blit path.

Parameters

Name	Type
texture	UnityEngine.Texture
rectPoints	UnityEngine.Rect
tint	UnityEngine.Color

Begin(DrawTopology, DrawMaterial)

public void Begin(DrawTopology topology, DrawMaterial material = DrawMaterial.Standard)

Begins a primitive batch with the given topology and material bucket. Must be balanced with ChartGuru.IChartDrawSink.End before another ChartGuru.IChartDrawSink.Begin(ChartGuru.DrawTopology%2cChartGuru.DrawMaterial).

Parameters

Name	Type
topology	ChartGuru.DrawTopology
material	ChartGuru.DrawMaterial

Color(Color)

public void Color(Color c)

Sets the current vertex color. Applies to all subsequently emitted vertices until overridden.

Parameters

Name	Type
c	UnityEngine.Color

Vertex(float, float)

public void Vertex(float x, float y)

Emits a vertex at the specified chart-space pixel coordinate (Y up, bottom-left origin).

Parameters

Name	Type
x	System.Single
y	System.Single

End()

public void End()

Closes the current primitive batch started by ChartGuru.IChartDrawSink.Begin(ChartGuru.DrawTopology%2cChartGuru.DrawMaterial).

SetScissor(Rect?)

public void SetScissor(Rect? clipRectPixels)

Sets an axis-aligned scissor rectangle in pixel coordinates, or clears it when null. Intended for morph and inset panels; the GL sink translates this to an SRP scissor, the UI Toolkit sink to a clipping descendant or manual CPU-side clipping.

Parameters

Name	Type
clipRectPixels	System.Nullable{UnityEngine.Rect}

PushTransform(Matrix4x4)

public void PushTransform(Matrix4x4 m)

Pushes a transform onto the sink’s matrix stack. Subsequent ChartGuru.IChartDrawSink.Vertex(System.Single%2cSystem.Single) calls are effectively multiplied by the top-of-stack matrix. Matches GL.PushMatrix + GL.MultMatrix(m).

Parameters

Name	Type
m	UnityEngine.Matrix4x4

PopTransform()

public void PopTransform()

Pops the top matrix from the sink’s transform stack. Matches GL.PopMatrix.