RenderPassContext class Rendering

The frame context handed to CustomRenderPass.execute.

A friendlier facade over the internal render graph. It exposes the standard pipeline buffers as read-only gpu.Texture handles, an object-filtered draw (drawObjects), and a full-screen shader step (applyShader) that advances this stage's color chain. The engine owns all GPU orchestration; a pass never creates command buffers or pipelines itself. It is created by the engine; do not construct one.

Properties

camera → Camera
The camera the current view is rendered with.
final
cameraInfo → ByteData
A packed PostCameraInfo std140 uniform block for reconstructing world positions from sceneDepthLinear. Layout: a vec4 (tan(fovX/2), tan(fovY/2), near, far), then the camera basis as three vec4s (right, up, forward, matching the depth prepass's view space: the eye at the origin looking down +forward), then a vec4 camera world position. Reconstruct with viewZ = depth; viewXY = (2*uv - 1 flipped) * viewZ * tangents; world = position + right*viewX + up*viewY + forward*viewZ. Bind it under a PostCameraInfo block via applyShader's uniforms. The projection terms are zero for a non-perspective camera (where depth is unavailable).
no setter
currentColor → Texture
The current color for this stage's chain (HDR at the HDR stages, the display image at the display stages). applyShader binds this as input_color automatically; this getter is for sampling it explicitly.
no setter
dimensions → Size
The render-target size in physical pixels.
final
displayColor → Texture
The current display-referred image (after tone mapping). Throws if read at the RenderStage.afterScene / RenderStage.beforeToneMapping stages (it does not exist yet); use sceneColorHdr there.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
sceneColorHdr → Texture
The linear HDR scene color. Available at every stage (at the display-referred stages it is the pre-tone-mapped color), so a custom pass can reach back to the HDR image.
no setter
sceneDepthLinear → Texture?
The linear (view-space) depth buffer: planar view-space depth (world units) in the red channel, with the octahedral-packed view-space normal in green/blue when RenderInput.normals was requested. Non-null when the pass declared RenderInput.depth (or RenderInput.normals) and the camera is perspective; also present when ambient occlusion or reflections ran.
no setter
shadowInfo → ByteData?
The packed PostShadowInfo std140 uniform block matching shadowMap: four mat4 world->cascade-clip matrices, a vec4 of the cascades' view-space split distances, a vec4 light direction (xyz world travel direction, w = cascade count), and a vec4 light color (rgb, premultiplied by intensity). Bind it under a PostShadowInfo block via applyShader's uniforms. Null when shadowMap is null.
no setter
shadowMap → Texture?
The directional light's cascaded shadow map atlas (a horizontal strip of shadowInfo cascade tiles, window-space depth in the red channel). Non-null when the pass declared RenderInput.shadowMap and the scene has a shadow-casting directional light. Pair with shadowInfo.
no setter
stage → RenderStage
The stage this pass was registered for.
final

Methods

applyShader(Shader fragmentShader, {Map<String, Texture> textures = const {}, Map<String, SamplerOptions> samplers = const {}, Map<String, ByteData> uniforms = const {}, bool frameInfo = false}) → void
Runs fragmentShader as a full-screen pass that advances this stage's color chain: the engine binds the current color as sampler2D input_color (sampled at the v_uv varying), renders into the next buffer, and makes it the current color for downstream passes.
drawObjects({NodeFilter filter = const NodeFilter.all(), Vector4? color, Vector4 colorOf(Object node)?, Vector4? clearColor}) → Texture
Draws a filtered set of the scene's geometry flat into a returned mask texture, each object filled with a color (coverage in alpha), with its own cleared depth so the objects self-occlude but are not occluded by the rest of the scene (an x-ray silhouette). The building block for masks, outlines, and highlights; sample the result in applyShader.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited