CrystalSpace

Public API Reference

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Geometry utilities


Classes

class  csBox2
 A bounding box in 2D space. More...
class  csBox3
 A bounding box in 3D space. More...
struct  csPoint
 A 2D point object. More...
class  csRect
 Rectangle class: simple class for manipulating 2D rectangles. More...
class  csRectRegion
 A rect region is a class that implements splittable 2d rectangles. More...
struct  csClipInfo
 Structure for use with ClipToPlane. More...
class  csFrustum
 A general frustum. More...
class  csMath2
 Various functions in 2D, such as 2D vector functions. More...
class  csIntersect2
 Some functions to perform various intersection calculations with 2D line segments. More...
class  csMath3
 Various assorted 3D mathematical functions. More...
class  csSquaredDist
 Some functions to perform squared distance calculations. More...
class  csIntersect3
 Some functions to perform various intersection calculations with 3D line segments. More...
class  csGeomDebugHelper
 This is a class that does unit testing (and other debug stuff) for most of csgeom classes. More...
class  csDVector3
 A 3D vector. More...
class  csDMatrix3
 A 3x3 matrix. More...
class  csDPlane
 A plane in 3D space. More...
class  csDMath3
 Various assorted 3D mathematical functions. More...
class  csDSquaredDist
 Some functions to perform squared distance calculations. More...
class  csDIntersect3
 Some functions to perform various intersection calculations with 3D line segments. More...
class  csMatrix2
 A 2x2 matrix. More...
class  csMatrix3
 A 3x3 matrix. More...
class  csXRotMatrix3
 An instance of csMatrix3 that is initialized as a rotation about X. More...
class  csYRotMatrix3
 An instance of csMatrix3 that is initialized as a rotation about Y. More...
class  csZRotMatrix3
 An instance of csMatrix3 that is initialized as a rotation about Z. More...
class  csXScaleMatrix3
 An instance of csMatrix3 that is initialized to scale the X dimension. More...
class  csYScaleMatrix3
 An instance of csMatrix3 that is initialized to scale the Y dimension. More...
class  csZScaleMatrix3
 An instance of csMatrix3 that is initialized to scale the Z dimension. More...
class  csOBB
 Oriented bounding box (OBB). More...
class  csOBBFrozen
 Version of the csOBB with frozen corners (for optimization purposes). More...
class  csObjectModel
 Helper class to make it easier to implement iObjectModel in mesh objects. More...
class  csPath
 A path in 3D. More...
class  csPlane2
 A plane in 2D space. More...
class  csPlane3
 A plane in 3D space. More...
struct  csPolygonMeshEdge
 A definition of one edge. More...
struct  csTriangleMinMax
 A triangle with minimum/maximum information on x. More...
class  csPolygonMeshTools
 A set of tools to work with iPolygonMesh instances. More...
class  csPoly2D
 The following class represents a general 2D polygon. More...
class  csPoly2DFactory
 This factory is responsible for creating csPoly2D objects or subclasses of csPoly2D. More...
class  csPoly3D
 The following class represents a general 3D polygon. More...
struct  csCompressVertex
 This structure is used by csVector3Array::CompressVertices(). More...
class  csVector3Array
 This is actually the same class as csPoly3D. More...
class  csClipper
 The csClipper class is an abstract parent to all 2D clipping objects. More...
class  csBoxClipper
 The csBoxClipper class is able to clip convex polygons to a rectangle (such as the screen). More...
class  csPolygonClipper
 The csPolygonClipper class can be used for clipping any polygon against any other convex polygon. More...
class  csPoly2DEdges
 The following class represents a general 2D polygon represented with edges instead of vertices. More...
class  csPoly2DEdgesPool
 This is an object pool which holds objects of type csPoly2DEdges. More...
class  csPolyIndexed
 The following class represents a general polygon. More...
class  csPolygonMesh
 A convenience polygon mesh implementation that you can feed with vertices and polygons from another source. More...
class  csPolygonMeshBox
 A convenience polygon mesh implementation that represents a cube. More...
class  csPoly2DPool
 This is an object pool which holds objects of type csPoly2D. More...
class  csQuaternion
 Class for a quaternion. More...
class  csSegment2
 A 2D line segment. More...
class  csSegment3
 A 3D line segment. More...
class  csSphere
 This class represents a sphere. More...
class  csSpline
 A spline superclass. More...
class  csCubicSpline
 A cubic spline. More...
class  csBSpline
 A B-spline. More...
class  csCatmullRomSpline
 A CatmullRom spline. More...
class  csSubRect
 Sub-rectangle. More...
class  csSubRectangles
 A class managing allocations of sub-rectangles. More...
class  csSubRectangles2
 A class managing allocations of sub-rectangles. More...
class  csTextureTrans
 This is a static class which encapsulates a few functions that can transform texture information into a texture matrix/vector. More...
class  csTransform
 A class which defines a transformation from one coordinate system to another. More...
class  csReversibleTransform
 A class which defines a reversible transformation from one coordinate system to another by maintaining an inverse transformation matrix. More...
class  csOrthoTransform
 A class which defines a reversible transformation from one coordinate system to another by maintaining an inverse transformation matrix. More...
struct  csTriangle
 A triangle. More...
class  csVector2
 A 2D vector. More...
class  csVector3
 A 3D vector. More...
class  csDVector4
 A 4D vector with "double" components. More...
class  csVector4
 A 4D vector with "float" components. More...
struct  csVertexStatus
 The clipper can output additional information about each vertex in output polygon. More...
struct  iClipper2D
 This interfaces represents a 2D clipper for polygons. More...
struct  iObjectModelListener
 Implement this class if you're interested in hearing about when the object model changes. More...
struct  iObjectModel
 This interface represents data related to some geometry in object space. More...
struct  iPath
 A path in 3D. More...
struct  csMeshedPolygon
 A polygon. More...
struct  iPolygonMesh
 This interface reprents a mesh of polygons. More...

Corner indices

For csBox2::GetCorner().

#define CS_BOX_CORNER_xy   0
 min X, min Y
#define CS_BOX_CORNER_xY   1
 min X, max Y
#define CS_BOX_CORNER_Xy   2
 max X, min Y
#define CS_BOX_CORNER_XY   3
 max X, max Y
#define CS_BOX_CENTER2   4
 center

Indices of edges for csBox2.

Index e+1 is opposite edge of e (with e even).

#define CS_BOX_EDGE_xy_Xy   0
 from min X, min Y to max X, min Y
#define CS_BOX_EDGE_Xy_xy   1
 from max X, min Y to min X, min Y
#define CS_BOX_EDGE_Xy_XY   2
 from max X, min Y to max X, max Y
#define CS_BOX_EDGE_XY_Xy   3
 from max X, max Y to max X, min Y
#define CS_BOX_EDGE_XY_xY   4
 from max X, max Y to min X, max Y
#define CS_BOX_EDGE_xY_XY   5
 from min X, max Y to max X, max Y
#define CS_BOX_EDGE_xY_xy   6
 from min X, max Y to min X, min Y
#define CS_BOX_EDGE_xy_xY   7
 from min X, min Y to min X, max Y

Indices of corner vertices for csBox3.

Used by csBox3::GetCorner().

#define CS_BOX_CORNER_xyz   0
 min X, min Y, min Z
#define CS_BOX_CORNER_xyZ   1
 min X, min Y, max Z
#define CS_BOX_CORNER_xYz   2
 min X, max Y, min Z
#define CS_BOX_CORNER_xYZ   3
 min X, max Y, max Z
#define CS_BOX_CORNER_Xyz   4
 min X, min Y, min Z
#define CS_BOX_CORNER_XyZ   5
 max X, min Y, max Z
#define CS_BOX_CORNER_XYz   6
 max X, max Y, min Z
#define CS_BOX_CORNER_XYZ   7
 max X, max Y, max Z
#define CS_BOX_CENTER3   8
 center

Indices of faces for csBox3.

Used by csBox3::GetSide().

#define CS_BOX_SIDE_x   0
 min X
#define CS_BOX_SIDE_X   1
 max X
#define CS_BOX_SIDE_y   2
 min Y
#define CS_BOX_SIDE_Y   3
 max Y
#define CS_BOX_SIDE_z   4
 min Z
#define CS_BOX_SIDE_Z   5
 max Z
#define CS_BOX_INSIDE   6
 inside

Indices of edges for csBox3.

Index e+1 is opposite edge of e (with e even).

#define CS_BOX_EDGE_Xyz_xyz   0
 from max X, min Y, min Z to min X, min Y, min Z
#define CS_BOX_EDGE_xyz_Xyz   1
 from min X, min Y, min Z to max X, min Y, min Z
#define CS_BOX_EDGE_xyz_xYz   2
 from min X, min Y, min Z to min X, max Y, min Z
#define CS_BOX_EDGE_xYz_xyz   3
 from min X, max Y, min Z to min X, min Y, min Z
#define CS_BOX_EDGE_xYz_XYz   4
 from min X, max Y, min Z to max X, max Y, min Z
#define CS_BOX_EDGE_XYz_xYz   5
 from max X, max Y, min Z to min X, max Y, min Z
#define CS_BOX_EDGE_XYz_Xyz   6
 from max X, max Y, min Z to max X, min Y, min Z
#define CS_BOX_EDGE_Xyz_XYz   7
 from max X, min Y, min Z to max X, max Y, min Z
#define CS_BOX_EDGE_Xyz_XyZ   8
 from max X, min Y, min Z to max X, min Y, max Z
#define CS_BOX_EDGE_XyZ_Xyz   9
 from max X, min Y, max Z to max X, min Y, min Z
#define CS_BOX_EDGE_XyZ_XYZ   10
 from max X, min Y, max Z to max X, max Y, max Z
#define CS_BOX_EDGE_XYZ_XyZ   11
 from max X, max Y, max Z to max X, min Y, max Z
#define CS_BOX_EDGE_XYZ_XYz   12
 from max X, max Y, max Z to max X, max Y, min Z
#define CS_BOX_EDGE_XYz_XYZ   13
 from max X, max Y, min Z to max X, max Y, max Z
#define CS_BOX_EDGE_XYZ_xYZ   14
 from max X, max Y, max Z to min X, max Y, max Z
#define CS_BOX_EDGE_xYZ_XYZ   15
 from min X, max Y, max Z to max X, max Y, max Z
#define CS_BOX_EDGE_xYZ_xYz   16
 from min X, max Y, max Z to min X, max Y, min Z
#define CS_BOX_EDGE_xYz_xYZ   17
 from min X, max Y, min Z to min X, max Y, max Z
#define CS_BOX_EDGE_xYZ_xyZ   18
 from min X, max Y, max Z to min X, min Y, max Z
#define CS_BOX_EDGE_xyZ_xYZ   19
 from min X, min Y, max Z to min X, max Y, max Z
#define CS_BOX_EDGE_xyZ_xyz   20
 from min X, min Y, max Z to min X, min Y, min Z
#define CS_BOX_EDGE_xyz_xyZ   21
 from min X, min Y, min Z to min X, min Y, max Z
#define CS_BOX_EDGE_xyZ_XyZ   22
 from min X, min Y, max Z to max X, min Y, max Z
#define CS_BOX_EDGE_XyZ_xyZ   23
 from max X, min Y, max Z to min X, min Y, max Z

Polygon-to-Frustum relations

Return values for csFrustum::Classify.

The routine makes a difference whenever a polygon is fully outside the frustum, fully inside, fully covers the frustum or is partly inside, partly outside.

#define CS_FRUST_OUTSIDE   0
 The polygon is fully outside frustum.
#define CS_FRUST_INSIDE   1
 The polygon is fully inside frustum.
#define CS_FRUST_COVERED   2
 The polygon fully covers the frustum.
#define CS_FRUST_PARTIAL   3
 The polygon is partially inside frustum.

Clipper return codes

The clipper routines return one of CS_CLIP_OUTSIDE, CS_CLIP_INSIDE, CS_CLIP_CLIPPED so that we can distinguish between the cases when input polygon is completely outside the clipping polygon (thus it is not visible), completely inside the clipping polygon (thus it has not changed) and partially outside, partially inside (thus it was clipped).

#define CS_CLIP_OUTSIDE   0
 The input polygon is completely outside of clipper polygon.
#define CS_CLIP_INSIDE   1
 The input polygon is completely inside (thus has not changed).
#define CS_CLIP_CLIPPED   2
 The input polygon was partially inside, partially outside.

Additional vertex informations

#define CS_VERTEX_ORIGINAL   0
 The output vertex is one of the input vertices.
#define CS_VERTEX_ONEDGE   1
 The output vertex is located on one of the edges of the original polygon.
#define CS_VERTEX_INSIDE   2
 The output vertex is located somewhere inside the original polygon.

Flags for iPolygonMesh

#define CS_POLYMESH_CLOSED   1
 The object is closed, if set.
#define CS_POLYMESH_NOTCLOSED   2
 The object is not closed, if set.
#define CS_POLYMESH_CONVEX   4
 The object is convex, if set.
#define CS_POLYMESH_NOTCONVEX   8
 The object is not convex, if set.
#define CS_POLYMESH_DEFORMABLE   16
 Set this flag if the polygon mesh is deformable.
#define CS_POLYMESH_TRIANGLEMESH   32
 Set this flag if the native or desired format of the polygon mesh is a triangle mesh.

Defines

#define CS_BOUNDINGBOX_MAXVALUE   1000000000.
 The maximum value that a coordinate in the bounding box can use.
#define MAX_OUTPUT_VERTICES   64
 Maximal number of vertices in output (clipped) polygons.

Typedefs

typedef void(* csAAPFCBPixel )(int x, int y, float area, void *arg)
 "Draw one pixel" callback
typedef void(* csAAPFCBBox )(int x, int y, int w, int h, void *arg)
 "Draw a box" callback

Functions

void BuildSqrtTable ()
 declare table of square roots
float FastSqrt (float n)
 fast square root, looks up table build by BuildSqrtTable().
template<class T>
const T & csMax (const T &a, const T &b)
 Returns bigger of a and b.
template<class T>
const T & csMin (const T &a, const T &b)
 Returns smaller of a and b.
template<class T>
csClamp (const T &a, T max, T min)
 Clamp a between max and min.
template<class T>
csSmoothStep (const T &a, T max, T min)
 Preforms a smooth interpolation of a on range min to max.
template<class T>
csSquare (const T &x)
 Returns the square of the argument.
void csAntialiasedPolyFill (csVector2 *iVertices, int iVertexCount, void *iArg, csAAPFCBPixel iPutPixel, csAAPFCBBox iDrawBox=0)
 This function takes a 2D polygon and splits it against a integer grid into many sub-polygons.

Define Documentation

#define CS_BOUNDINGBOX_MAXVALUE   1000000000.
 

The maximum value that a coordinate in the bounding box can use.

This is considered the 'infinity' value used for empty bounding boxes.

Definition at line 49 of file box.h.

Referenced by csBox2::csBox2(), and csBox3::csBox3().

#define CS_BOX_CENTER2   4
 

center

Definition at line 63 of file box.h.

#define CS_BOX_CENTER3   8
 

center

Definition at line 479 of file box.h.

#define CS_BOX_CORNER_XY   3
 

max X, max Y

Definition at line 61 of file box.h.

#define CS_BOX_CORNER_Xy   2
 

max X, min Y

Definition at line 59 of file box.h.

#define CS_BOX_CORNER_xY   1
 

min X, max Y

Definition at line 57 of file box.h.

#define CS_BOX_CORNER_xy   0
 

min X, min Y

Definition at line 55 of file box.h.

#define CS_BOX_CORNER_XYZ   7
 

max X, max Y, max Z

Definition at line 477 of file box.h.

#define CS_BOX_CORNER_XYz   6
 

max X, max Y, min Z

Definition at line 475 of file box.h.

#define CS_BOX_CORNER_XyZ   5
 

max X, min Y, max Z

Definition at line 473 of file box.h.

#define CS_BOX_CORNER_Xyz   4
 

min X, min Y, min Z

Definition at line 471 of file box.h.

#define CS_BOX_CORNER_xYZ   3
 

min X, max Y, max Z

Definition at line 469 of file box.h.

#define CS_BOX_CORNER_xYz   2
 

min X, max Y, min Z

Definition at line 467 of file box.h.

#define CS_BOX_CORNER_xyZ   1
 

min X, min Y, max Z

Definition at line 465 of file box.h.

#define CS_BOX_CORNER_xyz   0
 

min X, min Y, min Z

Definition at line 463 of file box.h.

#define CS_BOX_EDGE_xy_xY   7
 

from min X, min Y to min X, max Y

Definition at line 85 of file box.h.

#define CS_BOX_EDGE_xY_xy   6
 

from min X, max Y to min X, min Y

Definition at line 83 of file box.h.

#define CS_BOX_EDGE_xY_XY   5
 

from min X, max Y to max X, max Y

Definition at line 81 of file box.h.

#define CS_BOX_EDGE_XY_xY   4
 

from max X, max Y to min X, max Y

Definition at line 79 of file box.h.

#define CS_BOX_EDGE_XY_Xy   3
 

from max X, max Y to max X, min Y

Definition at line 77 of file box.h.

#define CS_BOX_EDGE_Xy_XY   2
 

from max X, min Y to max X, max Y

Definition at line 75 of file box.h.

#define CS_BOX_EDGE_Xy_xy   1
 

from max X, min Y to min X, min Y

Definition at line 73 of file box.h.

#define CS_BOX_EDGE_xy_Xy   0
 

from min X, min Y to max X, min Y

Definition at line 71 of file box.h.

#define CS_BOX_EDGE_XyZ_xyZ   23
 

from max X, min Y, max Z to min X, min Y, max Z

Definition at line 553 of file box.h.

#define CS_BOX_EDGE_xyZ_XyZ   22
 

from min X, min Y, max Z to max X, min Y, max Z

Definition at line 551 of file box.h.

#define CS_BOX_EDGE_xyz_xyZ   21
 

from min X, min Y, min Z to min X, min Y, max Z

Definition at line 549 of file box.h.

#define CS_BOX_EDGE_xyZ_xyz   20
 

from min X, min Y, max Z to min X, min Y, min Z

Definition at line 547 of file box.h.

#define CS_BOX_EDGE_xyZ_xYZ   19
 

from min X, min Y, max Z to min X, max Y, max Z

Definition at line 545 of file box.h.

#define CS_BOX_EDGE_xYZ_xyZ   18
 

from min X, max Y, max Z to min X, min Y, max Z

Definition at line 543 of file box.h.

#define CS_BOX_EDGE_xYz_xYZ   17
 

from min X, max Y, min Z to min X, max Y, max Z

Definition at line 541 of file box.h.

#define CS_BOX_EDGE_xYZ_xYz   16
 

from min X, max Y, max Z to min X, max Y, min Z

Definition at line 539 of file box.h.

#define CS_BOX_EDGE_xYZ_XYZ   15
 

from min X, max Y, max Z to max X, max Y, max Z

Definition at line 537 of file box.h.

#define CS_BOX_EDGE_XYZ_xYZ   14
 

from max X, max Y, max Z to min X, max Y, max Z

Definition at line 535 of file box.h.

#define CS_BOX_EDGE_XYz_XYZ   13
 

from max X, max Y, min Z to max X, max Y, max Z

Definition at line 533 of file box.h.

#define CS_BOX_EDGE_XYZ_XYz   12
 

from max X, max Y, max Z to max X, max Y, min Z

Definition at line 531 of file box.h.

#define CS_BOX_EDGE_XYZ_XyZ   11
 

from max X, max Y, max Z to max X, min Y, max Z

Definition at line 529 of file box.h.

#define CS_BOX_EDGE_XyZ_XYZ   10
 

from max X, min Y, max Z to max X, max Y, max Z

Definition at line 527 of file box.h.

#define CS_BOX_EDGE_XyZ_Xyz   9
 

from max X, min Y, max Z to max X, min Y, min Z

Definition at line 525 of file box.h.

#define CS_BOX_EDGE_Xyz_XyZ   8
 

from max X, min Y, min Z to max X, min Y, max Z

Definition at line 523 of file box.h.

#define CS_BOX_EDGE_Xyz_XYz   7
 

from max X, min Y, min Z to max X, max Y, min Z

Definition at line 521 of file box.h.

#define CS_BOX_EDGE_XYz_Xyz   6
 

from max X, max Y, min Z to max X, min Y, min Z

Definition at line 519 of file box.h.

#define CS_BOX_EDGE_XYz_xYz   5
 

from max X, max Y, min Z to min X, max Y, min Z

Definition at line 517 of file box.h.

#define CS_BOX_EDGE_xYz_XYz   4
 

from min X, max Y, min Z to max X, max Y, min Z

Definition at line 515 of file box.h.

#define CS_BOX_EDGE_xYz_xyz   3
 

from min X, max Y, min Z to min X, min Y, min Z

Definition at line 513 of file box.h.

#define CS_BOX_EDGE_xyz_xYz   2
 

from min X, min Y, min Z to min X, max Y, min Z

Definition at line 511 of file box.h.

#define CS_BOX_EDGE_xyz_Xyz   1
 

from min X, min Y, min Z to max X, min Y, min Z

Definition at line 509 of file box.h.

#define CS_BOX_EDGE_Xyz_xyz   0
 

from max X, min Y, min Z to min X, min Y, min Z

Definition at line 507 of file box.h.

#define CS_BOX_INSIDE   6
 

inside

Definition at line 499 of file box.h.

#define CS_BOX_SIDE_X   1
 

max X

Definition at line 489 of file box.h.

#define CS_BOX_SIDE_x   0
 

min X

Definition at line 487 of file box.h.

#define CS_BOX_SIDE_Y   3
 

max Y

Definition at line 493 of file box.h.

#define CS_BOX_SIDE_y   2
 

min Y

Definition at line 491 of file box.h.

#define CS_BOX_SIDE_Z   5
 

max Z

Definition at line 497 of file box.h.

#define CS_BOX_SIDE_z   4
 

min Z

Definition at line 495 of file box.h.

#define CS_CLIP_CLIPPED   2
 

The input polygon was partially inside, partially outside.

Definition at line 50 of file clip2d.h.

#define CS_CLIP_INSIDE   1
 

The input polygon is completely inside (thus has not changed).

Definition at line 48 of file clip2d.h.

#define CS_CLIP_OUTSIDE   0
 

The input polygon is completely outside of clipper polygon.

Definition at line 46 of file clip2d.h.

#define CS_FRUST_COVERED   2
 

The polygon fully covers the frustum.

Definition at line 47 of file frustum.h.

#define CS_FRUST_INSIDE   1
 

The polygon is fully inside frustum.

Definition at line 45 of file frustum.h.

#define CS_FRUST_OUTSIDE   0
 

The polygon is fully outside frustum.

Definition at line 43 of file frustum.h.

#define CS_FRUST_PARTIAL   3
 

The polygon is partially inside frustum.

Definition at line 49 of file frustum.h.

#define CS_POLYMESH_CLOSED   1
 

The object is closed, if set.

With closed we mean that if you run a beam of light through the object (through any point outside the mesh to another point outside) it will always hit an even amount of faces (one going in, and one going out). If you don't set CLOSED or NOTCLOSED then the state is not known and the engine may test it if it wants.

Definition at line 41 of file polymesh.h.

Referenced by csPolygonMeshBox::csPolygonMeshBox().

#define CS_POLYMESH_CONVEX   4
 

The object is convex, if set.

With convex we mean that if you run a beam of light through the object (through any point outside the mesh to another point outside) it will always hit exactly two faces (one going in, and one going out). If you don't set CONVEX or NOTCONVEX then the state is not known and the engine may test it if it wants.

Definition at line 61 of file polymesh.h.

Referenced by csPolygonMeshBox::csPolygonMeshBox().

#define CS_POLYMESH_DEFORMABLE   16
 

Set this flag if the polygon mesh is deformable.

Definition at line 76 of file polymesh.h.

#define CS_POLYMESH_NOTCLOSED   2
 

The object is not closed, if set.

This is the opposite of CS_POLYMESH_CLOSED. Use this flag if you are absolutely certain that the object is not closed. The engine will not attempt to test if the object is really closed or not. If you don't set CLOSED or NOTCLOSED then the state is not known and the engine may test it if it wants.

Definition at line 51 of file polymesh.h.

#define CS_POLYMESH_NOTCONVEX   8
 

The object is not convex, if set.

This is the opposite of CS_POLYMESH_CONVEX. Use this flag if you are absolutely certain that the object is not convex. The engine will not attempt to test if the object is really convex or not. If you don't set CONVEX or NOTCONVEX then the state is not known and the engine may test it if it wants.

Definition at line 71 of file polymesh.h.

#define CS_POLYMESH_TRIANGLEMESH   32
 

Set this flag if the native or desired format of the polygon mesh is a triangle mesh.

If this flag is set it means that GetTriangles() is very cheap. The presence of this flag does not mean that GetPolygons() will not work.

Definition at line 84 of file polymesh.h.

Referenced by csPolygonMeshBox::csPolygonMeshBox().

#define CS_VERTEX_INSIDE   2
 

The output vertex is located somewhere inside the original polygon.

Definition at line 79 of file clip2d.h.

#define CS_VERTEX_ONEDGE   1
 

The output vertex is located on one of the edges of the original polygon.

Definition at line 77 of file clip2d.h.

#define CS_VERTEX_ORIGINAL   0
 

The output vertex is one of the input vertices.

Definition at line 75 of file clip2d.h.

#define MAX_OUTPUT_VERTICES   64
 

Maximal number of vertices in output (clipped) polygons.

Definition at line 34 of file clip2d.h.


Typedef Documentation

typedef void(* csAAPFCBBox)(int x, int y, int w, int h, void *arg)
 

"Draw a box" callback

Definition at line 44 of file polyaa.h.

typedef void(* csAAPFCBPixel)(int x, int y, float area, void *arg)
 

"Draw one pixel" callback

We have two types of callback: one for "drawing a pixel", the area of the pixel is passed to the callback routine. The second routine is for "drawing a box", the area of every "pixel" is always 1.0.

Definition at line 42 of file polyaa.h.


Function Documentation

void BuildSqrtTable  ) 
 

declare table of square roots

void csAntialiasedPolyFill csVector2 iVertices,
int  iVertexCount,
void *  iArg,
csAAPFCBPixel  iPutPixel,
csAAPFCBBox  iDrawBox = 0
 

This function takes a 2D polygon and splits it against a integer grid into many sub-polygons.

Then the area of each subpolygon is computed and a callback function is called, with the area of sub-polygon passed as argument.

template<class T>
T csClamp const T &  a,
max,
min
 

Clamp a between max and min.

Definition at line 53 of file math.h.

References csMax(), and csMin().

template<class T>
const T& csMax const T &  a,
const T &  b
 

Returns bigger of a and b.

If they are equal, a or b can be returned.

Definition at line 32 of file math.h.

Referenced by csClamp().

template<class T>
const T& csMin const T &  a,
const T &  b
 

Returns smaller of a and b.

If they are equal, a or b can be returned.

Definition at line 42 of file math.h.

Referenced by csClamp(), and csFmtDefaultWriter< T >::Put().

template<class T>
T csSmoothStep const T &  a,
max,
min
 

Preforms a smooth interpolation of a on range min to max.

Definition at line 62 of file math.h.

template<class T>
T csSquare const T &  x  ) 
 

Returns the square of the argument.

Definition at line 81 of file math.h.

float FastSqrt float  n  ) 
 

fast square root, looks up table build by BuildSqrtTable().


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