Real-Time Physics Simulation Forum

first, I've searched about btHeightfieldTerrainShape, and then i realized that constructor doesn't need any normal data. is it compute normal itself by terrain height - index data?

second, is there any kind of form about parameter void* heightfieldData? I know that must be heightDataType - array, but there must be x - z coordinates or something, but only it gets are just array. is there any formula for this?

(1) The btHeightfieldTerrainShape uses its data to compute triangles. The normals are properties of the triangles and are computed as needed.

(2) The btHeightfieldTerrainShape::m_heightfieldDataFloat member variable is understood to be a regular 2D rectangular array of heights along one of the cardinal axes (as specified by the btHeightfieldTerrainShape::m_upAxis member variable). The other two components of a vertex on the heightfield are computed using the corresponding 2D index into the array combined with the btHeightfieldTerrainShape::m_width, m_height, and m_heightScale member variables.