public static FloatBuffer getDirectBuffer(float[] values, int Length)
{
directFloatBuffer.clear();
directFloatBuffer.limit(Length);
directFloatBuffer.put(values, 0, Length);
directFloatBuffer.rewind();
return(directFloatBuffer);
}
/**
* Expands a buffer of indexed triangle fan vertices to a buffer of non-indexed general-triangle vertices.
*
* @param indices the triangle indices.
* @param inBuf the vertex buffer the indices refer to, in the order x, y, z, x, y, z, ...
* @param outBuf the buffer in which to place the expanded triangle vertices. The buffer must have a limit
* sufficient to hold the output vertices.
*
* @throws ArgumentException if the index list or the input or output buffer is null, or if the output buffer
* size is insufficient.
*/
public static void expandTriangleFan(List <int> indices, FloatBuffer inBuf, FloatBuffer outBuf)
{
if (indices == null)
{
string msg = Logging.getMessage("nullValue.ListIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
if (inBuf == null || outBuf == null)
{
string msg = Logging.getMessage("nullValue.BufferIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
int nunTriangles = indices.Count - 2;
if (nunTriangles * 3 * 3 > outBuf.limit() - outBuf.position())
{
string msg = Logging.getMessage("generic.BufferSize", outBuf.limit() - outBuf.position());
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
int k = indices[0] * 3;
float v0x = inBuf.get(k);
float v0y = inBuf.get(k + 1);
float v0z = inBuf.get(k + 2);
for (int i = 1; i < indices.Count - 1; i++)
{
outBuf.put(v0x).put(v0y).put(v0z);
k = indices[i] * 3;
outBuf.put(inBuf.get(k)).put(inBuf.get(k + 1)).put(inBuf.get(k + 2));
k = indices[i + 1] * 3;
outBuf.put(inBuf.get(k)).put(inBuf.get(k + 1)).put(inBuf.get(k + 2));
}
}
/**
* Expands a buffer of indexed triangle strip vertices to a buffer of non-indexed general-triangle vertices.
*
* @param indices the triangle indices.
* @param inBuf the vertex buffer the indices refer to, in the order x, y, z, x, y, z, ...
* @param outBuf the buffer in which to place the expanded triangle vertices. The buffer must have a limit
* sufficient to hold the output vertices.
*
* @throws ArgumentException if the index list or the input or output buffer is null, or if the output buffer
* size is insufficient.
*/
public static void expandTriangleStrip(List <int> indices, FloatBuffer inBuf, FloatBuffer outBuf)
{
if (indices == null)
{
string msg = Logging.getMessage("nullValue.ListIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
if (inBuf == null || outBuf == null)
{
string msg = Logging.getMessage("nullValue.BufferIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
int nunTriangles = indices.Count - 2;
if (nunTriangles * 3 * 3 > outBuf.limit() - outBuf.position())
{
string msg = Logging.getMessage("generic.BufferSize", outBuf.limit() - outBuf.position());
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
for (int i = 2; i < indices.Count; i++)
{
int k = indices[i - 2] * 3;
outBuf.put(inBuf.get(k)).put(inBuf.get(k + 1)).put(inBuf.get(k + 2));
k = indices[i % 2 == 0 ? i : i - 1] * 3;
outBuf.put(inBuf.get(k)).put(inBuf.get(k + 1)).put(inBuf.get(k + 2));
k = indices[i % 2 == 0 ? i - 1 : i] * 3;
outBuf.put(inBuf.get(k)).put(inBuf.get(k + 1)).put(inBuf.get(k + 2));
}
}
public static FloatBuffer getDirectBuffer(int size, FloatBuffer buffer)
{
if (buffer == null)
{
return(buffer);
}
size = Round4(size);
if (buffer.Direct)
{
buffer.limit((size >> 2) + buffer.position());
return(buffer);
}
FloatBuffer directBuffer = allocateDirectBuffer(size).asFloatBuffer();
directBuffer.put((FloatBuffer)((FloatBuffer)buffer).slice().limit(size >> 2));
directBuffer.rewind();
return(directBuffer);
}
/**
* Compute the intersections of a line with a collection of triangles.
*
* @param line the line to intersect.
* @param vertices the triangles, arranged in a buffer as GL_TRIANGLES (9 floats per triangle).
*
* @return the list of intersections with the line and the triangles, or null if there are no intersections.
*
* @throws ArgumentException if the line or vertex buffer is null.
*/
public static List <Intersection> intersectTriangles(Line line, FloatBuffer vertices)
{
if (line == null)
{
string msg = Logging.getMessage("nullValue.LineIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
if (vertices == null)
{
string msg = Logging.getMessage("nullValue.BufferIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
List <Intersection> intersections = null;
vertices.rewind();
while (vertices.limit() - vertices.position() >= 9)
{
Intersection intersection = intersect(line,
vertices.get(), vertices.get(), vertices.get(),
vertices.get(), vertices.get(), vertices.get(),
vertices.get(), vertices.get(), vertices.get());
if (intersection != null)
{
if (intersections == null)
{
intersections = new List <Intersection>();
}
intersections.Add(intersection);
}
}
return(intersections);
}