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Edge

An edge contains information about one edge, between two points, of a triangle, as well as information about how to interpolate values when moving in the vertical direction.

Public Functions

Edge(const Gradients & gradients, const Point3D * vertices, int top, int bottom)
Initializes a new instance of the TextureMapTypes class.
FORCE_INLINE_FUNCTION intstep()
Perform a step along the edge.
FORCE_INLINE_FUNCTION intstep(int steps)
Performs a number of steps along the edge.

Public Attributes

int32_tdenominator
The denominator.
int32_terrorTerm
The error term.
intheight
The height.
int32_tnumerator
The numerator.
floatoneOverZ
The one over z coordinate.
floatoneOverZStep
The one over z coordinate step.
floatoneOverZStepExtra
The one over z coordinate step extra.
floatUOverZ
The over z coordinate.
floatUOverZStep
The over z coordinate step.
floatUOverZStepExtra
The over z coordinate step extra.
floatVOverZ
The over z coordinate.
floatVOverZStep
The over z coordinate step.
floatVOverZStepExtra
The over z coordinate step extra.
int32_tX
The X coordinate.
int32_tXStep
Amount to increment x.
intY
The Y coordinate.

Public Functions Documentation

Edge

Edge(const Gradients &gradients ,
const Point3D *vertices ,
inttop ,
intbottom
)

Initializes a new instance of the TextureMapTypes class.

Construct the edge between two vertices and uses the gradients for calculating the interpolation values.

Parameters:
gradientsThe gradients for the triangle.
verticesThe vertices for the triangle.
topThe index in the vertices array of the top vertex of this edge.
bottomThe index in the vertices array of the bottom vertex of this edge.

step

FORCE_INLINE_FUNCTION int step()

Perform a step along the edge.

Increase the Y and decrease the height.

Returns:

The remaining height.

step

FORCE_INLINE_FUNCTION int step(intsteps)

Performs a number of steps along the edge.

Parameters:
stepsThe number of steps the perform.
Returns:

The remaining height.

Public Attributes Documentation

denominator

int32_t denominator

The denominator.

errorTerm

int32_t errorTerm

The error term.

height

int height

The height.

numerator

int32_t numerator

The numerator.

oneOverZ

float oneOverZ

The one over z coordinate.

oneOverZStep

float oneOverZStep

The one over z coordinate step.

oneOverZStepExtra

float oneOverZStepExtra

The one over z coordinate step extra.

UOverZ

float UOverZ

The over z coordinate.

UOverZStep

float UOverZStep

The over z coordinate step.

UOverZStepExtra

float UOverZStepExtra

The over z coordinate step extra.

VOverZ

float VOverZ

The over z coordinate.

VOverZStep

float VOverZStep

The over z coordinate step.

VOverZStepExtra

float VOverZStepExtra

The over z coordinate step extra.

X

int32_t X

The X coordinate.

XStep

int32_t XStep

Amount to increment x.

Y

int Y

The Y coordinate.