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Stencil Operation⇨ Stencil buffer values are modified per-fragmentdepending on the state of the fragment: Fragment failed the stencil test Fragment passed the stencil test but failed the depthtest Fragment passed the stencil test and passed thedepth test© Copyright Ian D. Romanick 2009, 2011 9-February-2011
Stencil Operation⇨ Eight possible operations: GL_KEEP – Keep existing value GL_ZERO – Set value to zero GL_REPLACE – Replace value with a reference value GL_INCR – Increment value, clamp to max GL_INCR_WRAP – Increment value, wrap to zero GL_DECR – Decrement value, clamp to zero GL_DECR_WRAP – Decrement value, wrap to max GL_INVERT – Bitwise inversion of value⇨ Result is always masked with the stencil mask© Copyright Ian D. Romanick 2009, 2011 9-February-2011
Page 4 and 5: Stencil BufferglStencilFuncSeparate
Page 12 and 13: Stencil BufferglStencilOpSeparate(G
Page 18 and 19: Stencil Buffer⇨ Stencil buffer ca
Page 20 and 21: Stencil Buffer - ExampleglClearSten
Page 22 and 23: Stencil Buffer - FBOs⇨ Stencil bu
Page 24 and 25: Stencil Buffer - FBO ExampleglGenFr
Page 26 and 27: Shadow Volumes⇨ Proposed by Frank
Page 28 and 29: Shadow Volumes⇨ Basic algorithm:1
Page 30 and 31: Shadow Volumes⇨ Problems? Very
Page 32 and 33: Shadow Volumes⇨ Problems? Very
Page 34 and 35: Shadow Volumes - Z-Pass1. Disable d
Page 36 and 37: Shadow Volumes - Z-Pass⇨ Big prob
Page 38 and 39: Shadow Volumes - Z-Pass⇨ Big prob
Page 40 and 41: Shadow Volumes - Z-Fail1. Disable d
Page 42 and 43: Shadow Volumes - Z-Fail⇨ Big prob
Page 44 and 45: Shadow Volumes⇨ Front and back ca
Page 46 and 47: Shadow Volumes⇨ Advantages? Sha
Page 48 and 49: Shadow Volume Geometry⇨ Generatin
Page 50 and 51: Winged-Edge Mesh⇨ The original me
Page 52 and 53: Winged-Edge Mesh⇨ Desirable mesh
Page 54 and 55: Half-Edge Mesh⇨ Slight modificati
Page 56 and 57: Half-Edge Meshstruct half_edge {//
Page 58 and 59: Half-Edge Mesh⇨ If each HE only s
Page 60 and 61:
Half-Edge Mesh⇨ Given a vertex st
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Half-Edge Meshe>siblingf 0f 1v©
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Half-Edge Mesh⇨ What's the proble
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Half-Edge Mesh⇨ How can we add ne
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Half-Edge Mesh⇨ To make the HE wo
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Half-Edge Mesh⇨ Edges can be adde
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Half-Edge Mesh⇨ Relink the edges
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ReferencesMatt Pharr and Ken Schoem
Page 84 and 85:
Shadow Volume Geometry⇨ Once we h
Page 86 and 87:
Fixing Object Geometry⇨ What abou
Page 88 and 89:
Fixing Object Geometry⇨ What abou
Page 90:
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