NewtonTreeCollisionGetVertexListTriangleListInAABB

NewtonTreeCollisionGetVertexListTriangleListInAABB

int NewtonTreeCollisionGetVertexListTriangleListInAABB (const NewtonCollision* const treeCollision, const dFloat* const p0, const dFloat* const p1, const dFloat** const vertexArray, int* const vertexCount, int* const vertexStrideInBytes, const int* const indexList, int maxIndexCount, const int* const faceAttribute)

Usage

collect the vertex list index list mesh intersecting the AABB in collision mesh.

Parameters

• const NewtonCollision* const treeCollision
• const dFloat* const p0
• const dFloat* const p1
• const dFloat** const vertexArray
• int* const vertexCount
• int* const vertexStrideInBytes
• const int* const indexList
• int maxIndexCount
• const int* const faceAttribute

Return

• int - number of faces
• vertexStrideInBytes - gets filled with a value telling you the stride between vertexarray vertices (12 bytes)
• vertexArray - here you receive a pointer to array of vertexes in newton memory (data is not copied to your buffer, here you receive pointer to newton's data)
• faceAttribute and indexList get filled with data constructing the faces, returned geometry is always returned as triangles (3 indexes per face, and 1 faceattribute per face).

Description

• indexList should be a list 3 * maxIndexCount the number of elements.
• faceAttributet should be a list maxIndexCount the number of elements.
• this function could be used by the application for many purposes. For example it can be used to draw the collision geometry intersecting a collision primitive instead of drawing the entire collision tree in debug mode. Another use for this function is to to efficient draw projective texture shadows.