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1 | -- File : AIS_Triangulation.cdl |
| 2 | -- Created : 10 December 2009 |
| 3 | -- Author : Paul SUPRYATKIN |
| 4 | ---Copyright: Open CASCADE 2009 |
| 5 | |
| 6 | class Triangulation from AIS inherits InteractiveObject from AIS |
| 7 | |
| 8 | |
| 9 | ---Purpose: Interactive object that draws data from Poly_Triangulation, optionally with colors associated |
| 10 | -- with each triangulation vertex. For maximum efficiency colors are represented as 32-bit integers |
| 11 | -- instead of classic Quantity_Color values. |
| 12 | -- Interactive selection of triangles and vertices is not yet implemented. |
| 13 | |
| 14 | |
| 15 | uses |
| 16 | Triangulation from Poly, |
| 17 | HArray1OfInteger from TColStd, |
| 18 | Presentation from Prs3d, |
| 19 | PresentationManager3d from PrsMgr, |
| 20 | Selection from SelectMgr |
| 21 | |
| 22 | is |
| 23 | |
| 24 | Create(aTriangulation : Triangulation from Poly) |
| 25 | returns Triangulation from AIS; |
| 26 | ---Purpose: Constructs the Triangulation display object |
| 27 | |
| 28 | -- -- Methods from PresentableObject |
| 29 | |
| 30 | Compute(me : mutable; |
| 31 | aPresentationManager : PresentationManager3d from PrsMgr; |
| 32 | aPresentation : mutable Presentation from Prs3d; |
| 33 | aMode : Integer from Standard = 0) |
| 34 | is redefined private; |
| 35 | |
| 36 | -- Methods from SelectableObject |
| 37 | |
| 38 | ComputeSelection(me : mutable; |
| 39 | aSelection : mutable Selection from SelectMgr; |
| 40 | aMode : Integer from Standard) |
| 41 | is redefined private; |
| 42 | --- Empty implementation, does nothing |
| 43 | |
| 44 | SetColors(me : mutable; |
| 45 | aColor : HArray1OfInteger from TColStd); |
| 46 | ---Level: Public |
| 47 | ---Purpose: |
| 48 | -- Set the color for each node. |
| 49 | -- Each 32-bit color is Alpha << 24 + Blue << 16 + Green << 8 + Red |
| 50 | -- Order of color components is essential for further usage by OpenGL |
| 51 | |
| 52 | GetColors(me) |
| 53 | ---Level: Public |
| 54 | ---Purpose: |
| 55 | -- Get the color for each node. |
| 56 | -- Each 32-bit color is Alpha << 24 + Blue << 16 + Green << 8 + Red |
| 57 | |
| 58 | returns HArray1OfInteger from TColStd; |
| 59 | |
| 60 | |
| 61 | SetTriangulation( me : mutable; |
| 62 | aTriangulation : Triangulation from Poly); |
| 63 | ---Level: Public |
| 64 | |
| 65 | |
| 66 | GetTriangulation( me ) |
| 67 | returns Triangulation from Poly; |
| 68 | ---Level: Public |
| 69 | ---Purpose: Returns Poly_Triangulation . |
| 70 | |
| 71 | AttenuateColor( me : mutable; |
| 72 | aColor : Integer from Standard; |
| 73 | aComponent : Real from Standard ) |
| 74 | returns Integer from Standard |
| 75 | is private; |
| 76 | ---Level: Private |
| 77 | ---Purpose: Attenuates 32-bit color by a given attenuation factor (0...1): |
| 78 | -- aColor = Alpha << 24 + Blue << 16 + Green << 8 + Red |
| 79 | -- All color components are multiplied by aComponent, the result is then packed again as 32-bit integer. |
| 80 | -- Color attenuation is applied to the vertex colors in order to have correct visual result |
| 81 | -- after glColorMaterial(GL_AMBIENT_AND_DIFFUSE). Without it, colors look unnatural and flat. |
| 82 | |
| 83 | |
| 84 | fields |
| 85 | |
| 86 | myTriangulation : Triangulation from Poly; |
| 87 | myColor : HArray1OfInteger from TColStd; |
| 88 | myFlagColor : Integer from Standard; |
| 89 | myNbNodes : Integer from Standard; |
| 90 | myNbTriangles : Integer from Standard; |
| 91 | |
| 92 | end Triangulation; |
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