/// <summary>
/// Sets up the surface by defining it's control points, type and initial subdivision level.
/// </summary>
/// <remarks>
/// This method initialises the surface by passing it a set of control points. The type of curves to be used
/// are also defined here, although the only supported option currently is a bezier patch. You can also
/// specify a global subdivision level here if you like, although it is recommended that the parameter
/// is left as AUTO_LEVEL, which means the system decides how much subdivision is required (based on the
/// curvature of the surface).
/// </remarks>
/// <param name="controlPoints">
/// A pointer to a buffer containing the vertex data which defines control points
/// of the curves rather than actual vertices. Note that you are expected to provide not
/// just position information, but potentially normals and texture coordinates too. The
/// format of the buffer is defined in the VertexDeclaration parameter.
/// </param>
/// <param name="decl">
/// VertexDeclaration describing the contents of the buffer.
/// Note this declaration must _only_ draw on buffer source 0!
/// </param>
/// <param name="width">Specifies the width of the patch in control points.</param>
/// <param name="height">Specifies the height of the patch in control points.</param>
/// <param name="type">The type of surface.</param>
/// <param name="uMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="vMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="side">Determines which side of the patch (or both) triangles are generated for.</param>
public unsafe void DefineSurface(System.Array controlPointBuffer, VertexDeclaration declaration, int width, int height,
PatchSurfaceType type, int uMaxSubdivisionLevel, int vMaxSubdivisionLevel, VisibleSide visibleSide)
{
if (height == 0 || width == 0) {
return; // Do nothing - garbage
}
this.type = type;
this.controlWidth = width;
this.controlHeight = height;
this.controlCount = width * height;
this.controlPointBuffer = controlPointBuffer;
this.declaration = declaration;
// Copy positions into Vector3 vector
controlPoints.Clear();
VertexElement elem = declaration.FindElementBySemantic(VertexElementSemantic.Position);
int vertSize = declaration.GetVertexSize(0);
byte *pVert = (byte*)Marshal.UnsafeAddrOfPinnedArrayElement(controlPointBuffer, 0);
float* pReal = null;
for (int i = 0; i < controlCount; i++) {
pReal = (float*)(pVert + elem.Offset);
controlPoints.Add(new Vector3(pReal[0], pReal[1], pReal[2]));
pVert += vertSize;
}
this.side = visibleSide;
// Determine max level
// Initialise to 100% detail
subdivisionFactor = 1.0f;
if (uMaxSubdivisionLevel == AUTO_LEVEL) {
uLevel = maxULevel = GetAutoULevel();
}
else {
uLevel = maxULevel = uMaxSubdivisionLevel;
}
if (vMaxSubdivisionLevel == AUTO_LEVEL) {
vLevel = maxVLevel = GetAutoVLevel();
}
else {
vLevel = maxVLevel = vMaxSubdivisionLevel;
}
// Derive mesh width / height
meshWidth = (LevelWidth(maxULevel) - 1) * ((controlWidth-1) / 2) + 1;
meshHeight = (LevelWidth(maxVLevel) - 1) * ((controlHeight-1) / 2) + 1;
// Calculate number of required vertices / indexes at max resolution
requiredVertexCount = meshWidth * meshHeight;
int iterations = (side == VisibleSide.Both)? 2 : 1;
requiredIndexCount = (meshWidth-1) * (meshHeight - 1) * 2 * iterations * 3;
// Calculate bounds based on control points
Vector3 min = Vector3.Zero;
Vector3 max = Vector3.Zero;
float maxSqRadius = 0.0f;
bool first = true;
for(int i = 0; i < controlPoints.Count; i++) {
Vector3 vec = controlPoints[i];
if (first) {
min = max = vec;
maxSqRadius = vec.LengthSquared;
first = false;
}
else {
min.Floor(vec);
max.Ceil(vec);
maxSqRadius = MathUtil.Max(vec.LengthSquared, maxSqRadius);
}
}
// set the bounds of the patch
aabb.SetExtents(min, max);
boundingSphereRadius = MathUtil.Sqrt(maxSqRadius);
}
/// <summary>
/// Default contructor.
/// </summary>
public PatchSurface()
{
type = PatchSurfaceType.Bezier;
}
/// <summary>
/// Sets up the surface by defining it's control points, type and initial subdivision level.
/// </summary>
/// <remarks>
/// This method initialises the surface by passing it a set of control points. The type of curves to be used
/// are also defined here, although the only supported option currently is a bezier patch. You can also
/// specify a global subdivision level here if you like, although it is recommended that the parameter
/// is left as AUTO_LEVEL, which means the system decides how much subdivision is required (based on the
/// curvature of the surface).
/// </remarks>
/// <param name="controlPointArray">
/// An array containing the vertex data which define control points of the curves
/// rather than actual vertices. Note that you are expected to provide not
/// just position information, but potentially normals and texture coordinates too.
/// The array is internally treated as a contiguous memory buffer without any gaps between the elements.
/// The format of the buffer is defined in the VertexDeclaration parameter.
/// </param>
/// <param name="declaration">
/// VertexDeclaration describing the contents of the buffer.
/// Note this declaration must _only_ draw on buffer source 0!
/// </param>
/// <param name="width">Specifies the width of the patch in control points.</param>
/// <param name="height">Specifies the height of the patch in control points.</param>
/// <param name="type">The type of surface.</param>
/// <param name="uMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="vMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="visibleSide">Determines which side of the patch (or both) triangles are generated for.</param>
public void DefineSurface(Array controlPointArray, VertexDeclaration declaration, int width, int height,
PatchSurfaceType type, int uMaxSubdivisionLevel, int vMaxSubdivisionLevel,
VisibleSide visibleSide)
{
if (height == 0 || width == 0)
{
return; // Do nothing - garbage
}
//pin the input to have a pointer
Memory.UnpinObject(controlPointArray);
this.controlPointBuffer = Memory.PinObject(controlPointArray);
this.type = type;
this.controlWidth = width;
this.controlHeight = height;
this.controlCount = width * height;
this.declaration = declaration;
// Copy positions into Vector3 vector
this.controlPoints.Clear();
var elem = declaration.FindElementBySemantic(VertexElementSemantic.Position);
var vertSize = declaration.GetVertexSize(0);
#if !AXIOM_SAFE_ONLY
unsafe
#endif
{
var pVert = this.controlPointBuffer;
for (var i = 0; i < this.controlCount; i++)
{
var pReal = (pVert + ((i * vertSize) + elem.Offset)).ToFloatPointer();
this.controlPoints.Add(new Vector3(pReal[0], pReal[1], pReal[2]));
}
}
this.side = visibleSide;
// Determine max level
// Initialize to 100% detail
this.subdivisionFactor = 1.0f;
if (uMaxSubdivisionLevel == AUTO_LEVEL)
{
this.uLevel = this.maxULevel = GetAutoULevel();
}
else
{
this.uLevel = this.maxULevel = uMaxSubdivisionLevel;
}
if (vMaxSubdivisionLevel == AUTO_LEVEL)
{
this.vLevel = this.maxVLevel = GetAutoVLevel();
}
else
{
this.vLevel = this.maxVLevel = vMaxSubdivisionLevel;
}
// Derive mesh width / height
this.meshWidth = (LevelWidth(this.maxULevel) - 1) * ((this.controlWidth - 1) / 2) + 1;
this.meshHeight = (LevelWidth(this.maxVLevel) - 1) * ((this.controlHeight - 1) / 2) + 1;
// Calculate number of required vertices / indexes at max resolution
this.requiredVertexCount = this.meshWidth * this.meshHeight;
var iterations = (this.side == VisibleSide.Both) ? 2 : 1;
this.requiredIndexCount = (this.meshWidth - 1) * (this.meshHeight - 1) * 2 * iterations * 3;
// Calculate bounds based on control points
var min = Vector3.Zero;
var max = Vector3.Zero;
var maxSqRadius = 0.0f;
var first = true;
for (var i = 0; i < this.controlPoints.Count; i++)
{
var vec = this.controlPoints[i];
if (first)
{
min = max = vec;
maxSqRadius = vec.LengthSquared;
first = false;
}
else
{
min.Floor(vec);
max.Ceil(vec);
maxSqRadius = Utility.Max(vec.LengthSquared, maxSqRadius);
}
}
// set the bounds of the patch
this.aabb.SetExtents(min, max);
this.boundingSphereRadius = Utility.Sqrt(maxSqRadius);
}
/// <summary>
/// Default contructor.
/// </summary>
public PatchSurface()
{
this.type = PatchSurfaceType.Bezier;
}
/// <summary>
/// Sets up the surface by defining it's control points, type and initial subdivision level.
/// </summary>
/// <remarks>
/// This method initialises the surface by passing it a set of control points. The type of curves to be used
/// are also defined here, although the only supported option currently is a bezier patch. You can also
/// specify a global subdivision level here if you like, although it is recommended that the parameter
/// is left as AUTO_LEVEL, which means the system decides how much subdivision is required (based on the
/// curvature of the surface).
/// </remarks>
/// <param name="controlPointArray">
/// An array containing the vertex data which define control points of the curves
/// rather than actual vertices. Note that you are expected to provide not
/// just position information, but potentially normals and texture coordinates too.
/// The array is internally treated as a contiguous memory buffer without any gaps between the elements.
/// The format of the buffer is defined in the VertexDeclaration parameter.
/// </param>
/// <param name="declaration">
/// VertexDeclaration describing the contents of the buffer.
/// Note this declaration must _only_ draw on buffer source 0!
/// </param>
/// <param name="width">Specifies the width of the patch in control points.</param>
/// <param name="height">Specifies the height of the patch in control points.</param>
/// <param name="type">The type of surface.</param>
/// <param name="uMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="vMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="visibleSide">Determines which side of the patch (or both) triangles are generated for.</param>
public void DefineSurface( Array controlPointArray, VertexDeclaration declaration, int width, int height,
PatchSurfaceType type, int uMaxSubdivisionLevel, int vMaxSubdivisionLevel,
VisibleSide visibleSide )
{
if ( height == 0 || width == 0 )
{
return; // Do nothing - garbage
}
//pin the input to have a pointer
Memory.UnpinObject( controlPointArray );
this.controlPointBuffer = Memory.PinObject( controlPointArray );
this.type = type;
this.controlWidth = width;
this.controlHeight = height;
this.controlCount = width*height;
this.declaration = declaration;
// Copy positions into Vector3 vector
this.controlPoints.Clear();
var elem = declaration.FindElementBySemantic( VertexElementSemantic.Position );
var vertSize = declaration.GetVertexSize( 0 );
#if !AXIOM_SAFE_ONLY
unsafe
#endif
{
var pVert = this.controlPointBuffer;
for ( var i = 0; i < this.controlCount; i++ )
{
var pReal = ( pVert + ( ( i*vertSize ) + elem.Offset ) ).ToFloatPointer();
this.controlPoints.Add( new Vector3( pReal[ 0 ], pReal[ 1 ], pReal[ 2 ] ) );
}
}
this.side = visibleSide;
// Determine max level
// Initialize to 100% detail
this.subdivisionFactor = 1.0f;
if ( uMaxSubdivisionLevel == AUTO_LEVEL )
{
this.uLevel = this.maxULevel = GetAutoULevel();
}
else
{
this.uLevel = this.maxULevel = uMaxSubdivisionLevel;
}
if ( vMaxSubdivisionLevel == AUTO_LEVEL )
{
this.vLevel = this.maxVLevel = GetAutoVLevel();
}
else
{
this.vLevel = this.maxVLevel = vMaxSubdivisionLevel;
}
// Derive mesh width / height
this.meshWidth = ( LevelWidth( this.maxULevel ) - 1 )*( ( this.controlWidth - 1 )/2 ) + 1;
this.meshHeight = ( LevelWidth( this.maxVLevel ) - 1 )*( ( this.controlHeight - 1 )/2 ) + 1;
// Calculate number of required vertices / indexes at max resolution
this.requiredVertexCount = this.meshWidth*this.meshHeight;
var iterations = ( this.side == VisibleSide.Both ) ? 2 : 1;
this.requiredIndexCount = ( this.meshWidth - 1 )*( this.meshHeight - 1 )*2*iterations*3;
// Calculate bounds based on control points
var min = Vector3.Zero;
var max = Vector3.Zero;
var maxSqRadius = 0.0f;
var first = true;
for ( var i = 0; i < this.controlPoints.Count; i++ )
{
var vec = this.controlPoints[ i ];
if ( first )
{
min = max = vec;
maxSqRadius = vec.LengthSquared;
first = false;
}
else
{
min.Floor( vec );
max.Ceil( vec );
maxSqRadius = Utility.Max( vec.LengthSquared, maxSqRadius );
}
}
// set the bounds of the patch
this.aabb.SetExtents( min, max );
this.boundingSphereRadius = Utility.Sqrt( maxSqRadius );
}
/// <summary>
/// Sets up the surface by defining it's control points, type and initial subdivision level.
/// </summary>
/// <remarks>
/// This method initialises the surface by passing it a set of control points. The type of curves to be used
/// are also defined here, although the only supported option currently is a bezier patch. You can also
/// specify a global subdivision level here if you like, although it is recommended that the parameter
/// is left as AUTO_LEVEL, which means the system decides how much subdivision is required (based on the
/// curvature of the surface).
/// </remarks>
/// <param name="controlPoints">
/// A pointer to a buffer containing the vertex data which defines control points
/// of the curves rather than actual vertices. Note that you are expected to provide not
/// just position information, but potentially normals and texture coordinates too. The
/// format of the buffer is defined in the VertexDeclaration parameter.
/// </param>
/// <param name="decl">
/// VertexDeclaration describing the contents of the buffer.
/// Note this declaration must _only_ draw on buffer source 0!
/// </param>
/// <param name="width">Specifies the width of the patch in control points.</param>
/// <param name="height">Specifies the height of the patch in control points.</param>
/// <param name="type">The type of surface.</param>
/// <param name="uMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="vMaxSubdivisionLevel">
/// If you want to manually set the top level of subdivision,
/// do it here, otherwise let the system decide.
/// </param>
/// <param name="side">Determines which side of the patch (or both) triangles are generated for.</param>
public unsafe void DefineSurface(System.Array controlPointBuffer, VertexDeclaration declaration, int width, int height,
PatchSurfaceType type, int uMaxSubdivisionLevel, int vMaxSubdivisionLevel, VisibleSide visibleSide)
{
if (height == 0 || width == 0)
{
return; // Do nothing - garbage
}
this.type = type;
this.controlWidth = width;
this.controlHeight = height;
this.controlCount = width * height;
this.controlPointBuffer = controlPointBuffer;
this.declaration = declaration;
// Copy positions into Vector3 vector
controlPoints.Clear();
VertexElement elem = declaration.FindElementBySemantic(VertexElementSemantic.Position);
int vertSize = declaration.GetVertexSize(0);
byte * pVert = (byte *)Marshal.UnsafeAddrOfPinnedArrayElement(controlPointBuffer, 0);
float * pReal = null;
for (int i = 0; i < controlCount; i++)
{
pReal = (float *)(pVert + elem.Offset);
controlPoints.Add(new Vector3(pReal[0], pReal[1], pReal[2]));
pVert += vertSize;
}
this.side = visibleSide;
// Determine max level
// Initialise to 100% detail
subdivisionFactor = 1.0f;
if (uMaxSubdivisionLevel == AUTO_LEVEL)
{
uLevel = maxULevel = GetAutoULevel();
}
else
{
uLevel = maxULevel = uMaxSubdivisionLevel;
}
if (vMaxSubdivisionLevel == AUTO_LEVEL)
{
vLevel = maxVLevel = GetAutoVLevel();
}
else
{
vLevel = maxVLevel = vMaxSubdivisionLevel;
}
// Derive mesh width / height
meshWidth = (LevelWidth(maxULevel) - 1) * ((controlWidth - 1) / 2) + 1;
meshHeight = (LevelWidth(maxVLevel) - 1) * ((controlHeight - 1) / 2) + 1;
// Calculate number of required vertices / indexes at max resolution
requiredVertexCount = meshWidth * meshHeight;
int iterations = (side == VisibleSide.Both)? 2 : 1;
requiredIndexCount = (meshWidth - 1) * (meshHeight - 1) * 2 * iterations * 3;
// Calculate bounds based on control points
Vector3 min = Vector3.Zero;
Vector3 max = Vector3.Zero;
float maxSqRadius = 0.0f;
bool first = true;
for (int i = 0; i < controlPoints.Count; i++)
{
Vector3 vec = controlPoints[i];
if (first)
{
min = max = vec;
maxSqRadius = vec.LengthSquared;
first = false;
}
else
{
min.Floor(vec);
max.Ceil(vec);
maxSqRadius = MathUtil.Max(vec.LengthSquared, maxSqRadius);
}
}
// set the bounds of the patch
aabb.SetExtents(min, max);
boundingSphereRadius = MathUtil.Sqrt(maxSqRadius);
}
