tests/glean/geomutil.h

   1 // BEGIN_COPYRIGHT -*- glean -*-
   2 //
   3 // Copyright (C) 1999,2000  Allen Akin   All Rights Reserved.
   4 //
   5 // Permission is hereby granted, free of charge, to any person
   6 // obtaining a copy of this software and associated documentation
   7 // files (the "Software"), to deal in the Software without
   8 // restriction, including without limitation the rights to use,
   9 // copy, modify, merge, publish, distribute, sublicense, and/or
  10 // sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following
  12 // conditions:
  13 //
  14 // The above copyright notice and this permission notice shall be
  15 // included in all copies or substantial portions of the
  16 // Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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  27 // END_COPYRIGHT
  28
  29
  30
  31
  32 // geomutil.h:  frequently-used geometric operations
  33
  34 #ifndef __geomutil_h__
  35 #define __geomutil_h__
  36
  37 #include <vector>
  38
  39 namespace GLEAN {
  40
  41 class RandomDouble;             // Forward reference.
  42
  43 class RandomMesh2D {
  44         float* m;
  45         int rowLength;
  46     public:
  47         RandomMesh2D(float minX, float maxX, int xPoints,
  48                    float minY, float maxY, int yPoints,
  49                    RandomDouble& rand);
  50         ~RandomMesh2D();
  51         inline float* operator() (int y, int x)
  52                 { return m + 2 * (y * rowLength + x); }
  53 }; // RandomMesh2D
  54
  55 class SpiralStrip2D {
  56         float* v;
  57     public:
  58         SpiralStrip2D(int nPoints, float minX, float maxX,
  59                 float minY, float maxY);
  60         ~SpiralStrip2D();
  61         inline float* operator() (int i)
  62                 { return v + 2 * i; }
  63 }; // SpiralStrip2D
  64
  65 class SpiralTri2D {
  66         float* v;
  67     public:
  68         SpiralTri2D(int nTris, float minX, float maxX,
  69                 float minY, float maxY);
  70         ~SpiralTri2D();
  71         inline float* operator() (int i)
  72                 { return v + 6 * i; }
  73 }; // SpiralTri2D
  74
  75 class Sphere3D {
  76     std::vector<float> vertices;
  77     std::vector<float> normals;
  78     int numVertices;
  79     std::vector<unsigned int> indices;
  80     int numIndices;
  81  public:
  82     Sphere3D(float radius, int slices, int stacks);
  83
  84     // This returns the vertices: 3 floats per vertex in a tightly packed array (no padding between vertices).
  85     const float* getVertices() const;
  86     int getNumVertices() const;
  87
  88     // This returns the normals; same data format as the vertices.  And of course the number of normals is
  89     // the same as the number of vertices.
  90     const float* getNormals() const;
  91
  92     // This returns a series of vertices that form triangles from the vertices (the indices specify loose
  93     // triangles, not tristrips or fans or whatnot.  So each triplet of indices is an individual triangle.)
  94     const unsigned int* getIndices() const;
  95     int getNumIndices() const;
  96 };
  97
  98 } // namespace GLEAN
  99
 100 #endif // __geomutil_h__