Qt3D Renderer Elements

Qt3D Scene Structure and Elements

Renderer elements

The Renderer aspect defines its own set of elements.

Nodes

==

• Effect
  Specifies a list of techniques and default values to be used by the renderer to properly assign shaders and uniforms.

==

• RenderPass
  Specifies the ShaderProgram o be used for a pass of a technique.
  The render pass should have a name.

==

• Technique
  Contains a list of RenderPass elements.

==

• ShaderProgram
  Has paths pointing to fragment and vertex shader sources.

FrameGraphItems

Only a single framegraph can be used at any moment for the rendering of the scene.

==

• Viewport
  Defines the viewport rectangle to be used.Note : The viewport rectangle is defined from top left unlike OpenGL which defines it from bottom left.

==

• CameraSelector
  Defines the camera entity to be used.

==

• RenderPassFilter
  Defines the name of the RenderPass to be used.

==

• RenderTargetSelector
  To be done – Defines the RenderTarget (Texture/FBO/Screen)

==

• TechniqueFilter
  Defines the name of the technique to be used.

Entity

==

• Scene Has a source property that can be set to the path of a 3D scene file to be loaded into the current scenegraph tree.

Components

==

• Mesh
  Specifies the path toward a mesh source file.

==

• Material
  Specifies an Effect and may override uniforms set by the Effect to be used
  by the Techniques’ ShaderPrograms
  Also specifies the textures.

==

• Shape
  Can be a shaper of one of the types :
  • Cube
  • Sphere
  • Cylinder
  • Torus
    Additional properties allow to further define the shape and its precision.

==

• FrameGraph
  Defines the tree of FrameGraphItems to be used as the rendering pipeline.

Categories:

• Developing_with_Qt
  • Qt3D:Qt3D_wip_newapi_Overview