Texture Mapping Adam Finkelstein Princeton University COS 426, Spring 2003 Surface Image Texture Textures • Describe color variation in interior of 3D polygon o When scan converting a polygon, vary pixel colors according to values fetched from a texture Angel Figure 9.3 3D Rendering Pipeline (for direct illumination) 3D Primitives Modeling Transformation Modeling Transformation Projection Transformation Projection Transformation Clipping Clipping Lighting Lighting Image Viewport Transformation Viewport Transformation Scan Conversion Scan Conversion 2D Image Coordinates 3D Modeling Coordinates 3D World Coordinates 3D Camera Coordinates 2D Screen Coordinates 2D Screen Coordinates Viewing Transformation Viewing Transformation 3D World Coordinates 2D Image Coordinates Texture mapping Surface Textures • Add visual detail to surfaces of 3D objects Polygonal model With surface texture Surface Textures • Add visual detail to surfaces of 3D objects [Daren Horley] Overview • Texture mapping methods o Parameterization o Mapping o Filtering • Texture mapping applications o Modulation textures o Illumination mapping o Bump mapping o Environment mapping o Image-based rendering o Non-photorealistic rendering
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Texture Mapping - Princeton University Computer … · Texture Mapping • Scan conversion ... Point sampling Area filtering Texture Filtering ... Solid textures Texture values indexed
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Texture Mapping
Adam FinkelsteinPrinceton University
COS 426, Spring 2003 SurfaceImageTexture
Textures• Describe color variation in interior of 3D polygon
o When scan converting a polygon, vary pixel colors according to values fetched from a texture
Angel Figure 9.3
3D Rendering Pipeline (for direct illumination)
3D Primitives
ModelingTransformation
ModelingTransformation
ProjectionTransformation
ProjectionTransformation
ClippingClipping
LightingLighting
Image
ViewportTransformation
ViewportTransformation
ScanConversion
ScanConversion
2D Image Coordinates
3D Modeling Coordinates
3D World Coordinates
3D Camera Coordinates
2D Screen Coordinates
2D Screen Coordinates
ViewingTransformation
ViewingTransformation
3D World Coordinates
2D Image Coordinates
Texture mapping
Surface Textures• Add visual detail to surfaces of 3D objects
Polygonal model
With surface texture
Surface Textures• Add visual detail to surfaces of 3D objects