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GRAPHICS PIPELINE
INTRODUCTION TO 3D PROGRAMMING
@ta_ka_tsu
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3D DATA
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FRAME BUFFER
Direct3D(Windows)
OpenGL/OpenGLES
Metal(macOS/iOS)
Vulkan
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GRAPHICS
PIPELINE
3D DATA
FRAME BUFFER Metal : MTLRenderPipelineState
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Point Line Triangle
(Polygon)
PRIMITIVE
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VERTEX
ɾPosition
ɾColor
ɾNormal Vector
ɾTexture Coordinate
ɾ…
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GRAPHICS
PIPELINE
VERTEX
FRAME BUFFER
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Vertex Processing
Primitive Assembly
Rasterization
Fragment Processing
Per-Sample Operations
FRAME BUFFER
VERTEX
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Vertex Processing
Metal :
OpenGLES(2.0ʙ) : Vertex Shader
Vertex Shader
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Vertex Processing
Vertex
Vertex
ɾPosition
ɾColor
ɾNormal Vector
ɾTexture Coordinate
ɾ…
ɾPosition
ɾColor
ɾTexture Coordinate
ɾ…
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Vertex Processing
- Coordinate Transformation -
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Vertex Processing
- Coordinate Transformation -
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Vertex Processing
- Coordinate Transformation -
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- Clipping -
Vertex Processing
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- Viewport Transformation -
Metal :
OpenGLES(2.0ʙ) : glViewport(…)
MTLRenderCommandEncoder
setViewport(…)
Vertex Processing
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Primitive Assembly
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Primitive Assembly
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Primitive Assembly
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Primitive Assembly
- Face Culling -
Metal :
OpenGLES(2.0ʙ) : glEnable(GL_CULL_FACE)
MTLRenderCommandEncoder
setCullMode(…)
setFrontFacing(…)
Culling Off
Culling On
glFrontFace(…)
glCullFace(…)
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Rasterization
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Rasterization
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Rasterization
Fragment ɾColor
ɾTexture Coordinate
ɾ…
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Fragment Processing
Metal :
OpenGLES(2.0ʙ) : Fragment Shader
Fragment Shader
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Fragment Processing
Fragment
Color
ɾColor
ɾNormal Vector
ɾTexture Coordinate
ɾ…
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Per-Sample Operations
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Per-Sample Operations
- Pixel Ownership Test -
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Per-Sample Operations
Metal :
OpenGLES(2.0ʙ) :
- Depth Test -
glEnable(GL_DEPTH_TEST)
Depth Test Off
Depth Test On
MTLDepthStencilDescriptor
isDepthWriteEnabled
depthCompareFunction
glDepthFunc(…)
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Per-Sample Operations
+ =
α ×
(1 - α) ×
Metal :
OpenGLES(2.0ʙ) :
isBlendingEnable
(rgb | alpha)BlendOperation
(source | destination)(RBG | Alpha)BlendFactor
MTLRenderPipelineColorAttachmentDescriptor
- Blending -
glBlendFunc(…)
glEnable(GL_BLEND)
glBlendEquation(…)
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ENJOY 3D PROGRAMMING!