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Jun 20th, 2019
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  1. float math_scale_values(float originalValue, float minOriginalRange, float maxOriginalRange, float minNewRange, float maxNewRange)
  2. {
  3. // MATH_SCALE_VALUES
  4. // Converts a value from one range into another
  5. // (maxNewRange - minNewRange)(originalValue - minOriginalRange)
  6. // y = ----------------------------------------------------------- + minNewRange
  7. // (maxOriginalRange - minOriginalRange)
  8. return minNewRange + (((maxNewRange - minNewRange) * (originalValue - minOriginalRange)) / (maxOriginalRange - minOriginalRange));
  9. }
  10.  
  11. void math_get_UV_min_max_range(RpTriangle&pTriangle, RwTextureCoordinates* pTextureCoordinateArray,
  12. float& MinUOriginalRange, float& MaxUOriginalRange, float& MinVOriginalRange, float& MaxVOriginalRange)
  13. {
  14. bool bMinURangeSet = false;
  15. bool bMaxURangeSet = false;
  16.  
  17. bool bMinVRangeSet = false;
  18. bool bMaxVRangeSet = false;
  19.  
  20. for (int j = 0; j < 3; j++)
  21. {
  22.  
  23. unsigned short vertIndex = pTriangle.vertIndex[j];
  24.  
  25. RwTextureCoordinates& pTextureCoordinates = pTextureCoordinateArray[vertIndex];
  26. //theVertex->u = (theVertex->u / atlasWidth * textureWidth) + (1 / atlasWidth * textureStartInAtlasOffsetW);
  27. //theVertex->v = (theVertex->v / atlasHeight * textureHeight) + (1 / atlasHeight * textureStartInAtlasOffsetH);
  28.  
  29. //pTextureCoordinates.u = (pTextureCoordinates.u / vecAtlasSize.fX * textureWidth) + (1 / vecAtlasSize.fX * texturePositionInAtlas.left);
  30. //pTextureCoordinates.v = (pTextureCoordinates.v / vecAtlasSize.fY * textureHeight) + (1 / vecAtlasSize.fY * texturePositionInAtlas.top);
  31.  
  32. if (!bMinURangeSet)
  33. {
  34. bMinURangeSet = true;
  35. MinUOriginalRange = pTextureCoordinates.u;
  36. }
  37.  
  38. if (!bMaxURangeSet)
  39. {
  40. bMaxURangeSet = true;
  41. MaxUOriginalRange = pTextureCoordinates.u;
  42. }
  43.  
  44. if (!bMinVRangeSet)
  45. {
  46. bMinVRangeSet = true;
  47. MinVOriginalRange = pTextureCoordinates.v;
  48. }
  49.  
  50. if (!bMaxVRangeSet)
  51. {
  52. bMaxVRangeSet = true;
  53. MaxVOriginalRange = pTextureCoordinates.v;
  54. }
  55.  
  56. if (pTextureCoordinates.u < MinUOriginalRange)
  57. {
  58. MinUOriginalRange = pTextureCoordinates.u;
  59. }
  60.  
  61. if (pTextureCoordinates.u > MaxUOriginalRange)
  62. {
  63. MaxUOriginalRange = pTextureCoordinates.u;
  64. }
  65.  
  66.  
  67. if (pTextureCoordinates.v < MinVOriginalRange)
  68. {
  69. MinVOriginalRange = pTextureCoordinates.v;
  70. }
  71.  
  72. if (pTextureCoordinates.v > MaxVOriginalRange)
  73. {
  74. MaxVOriginalRange = pTextureCoordinates.v;
  75. }
  76. }
  77. }
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