Documentation
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Index ¶
- Constants
- func Area(sz image.Point) int
- func PointsClone(pts []image.Point) []image.Point
- func SizeGroups(sizes []int, maxN int) []int
- func UniqSortedInts(vals []int) []int
- func XYFromGpIndex(gi, nxi int) (xi, yi int)
- type Indexes
- type SzAlloc
- func (sa *SzAlloc) Alloc()
- func (sa *SzAlloc) AllocGpItems()
- func (sa *SzAlloc) AllocGps(xgpi, ygpi []int) (allocs [][]int, maxItems int)
- func (sa *SzAlloc) AllocItemsNoGps()
- func (sa *SzAlloc) AllocItemsUniqGps()
- func (sa *SzAlloc) LimitGpNs()
- func (sa *SzAlloc) PrintGps()
- func (sa *SzAlloc) SetSizes(gps image.Point, itmsPerGp int, itms []image.Point)
- func (sa *SzAlloc) SizesFromIndexes(xgpi, ygpi []int) []image.Point
- func (sa *SzAlloc) UniqSz()
- func (sa *SzAlloc) UpdateGpMaxSz()
- func (sa *SzAlloc) XYSizeFromIndex(idx image.Point) image.Point
Constants ¶
const MaxIters = 100
MaxIters is maximum number of iterations for adapting sizes to fit constraints
Variables ¶
This section is empty.
Functions ¶
func PointsClone ¶
PointsClone returns clone of []image.Point list
func SizeGroups ¶
SizeGroups returns evenly spaced size groups of max N -- could be less
func UniqSortedInts ¶
UniqSortedInts returns the ints in sorted order with only unique vals
func XYFromGpIndex ¶ added in v0.0.10
XYFromGpIndex returns x, y indexes from gp index
Types ¶
type Indexes ¶ added in v0.0.10
type Indexes struct {
// percent size of this image relative to max size allocated
PctSize math32.Vector2
// group index
GpIndex int
// item index within group (e.g., Layer)
ItemIndex int
}
Indexes contains the indexes where a given item image size is allocated there is one of these per each ItemSizes
type SzAlloc ¶
type SzAlloc struct {
// true if configured and ready to use
On bool
// maximum number of groups in X and Y dimensions
MaxGps image.Point
// maximum number of groups = X * Y
MaxNGps int
// maximum number of items per group -- constraint is enforced in addition to MaxGps
MaxItemsPerGp int
// original list of item sizes to be allocated
ItemSizes []image.Point
// list of all unique sizes -- operate on this for grouping
UniqSizes []image.Point
// map of all unique sizes, with group index as value
UniqSzMap map[image.Point]int
// indexes into UniqSizes slice, ordered by ItemSizes indexes
UniqSzItems []int
// list of allocated group sizes
GpSizes []image.Point
// allocation of image indexes by group -- first index is group, second is list of items for that group
GpAllocs [][]int
// allocation image value indexes to image indexes
ItemIndexes []*Indexes
// sorted list of all unique sizes
XSizes []int
// sorted list of all unique sizes
YSizes []int
// number of items in each dimension group (X, Y)
GpNs image.Point
// list of x group indexes
XGpIndexes []int
// list of y group indexes
YGpIndexes []int
}
SzAlloc manages allocation of sizes to a spec'd maximum number of groups. Used for allocating texture images to image arrays under the severe constraints of only 16 images. Only a maximum of MaxItemsPerGp items can be allocated per grouping.
func (*SzAlloc) AllocGpItems ¶
func (sa *SzAlloc) AllocGpItems()
AllocGpItems allocates items in groups based on final GpAllocs
func (*SzAlloc) AllocGps ¶
AllocGps allocates groups based on given indexes into XSizes, YSizes. returns allocs = indexes of items per each group, and max number of items per group
func (*SzAlloc) AllocItemsNoGps ¶
func (sa *SzAlloc) AllocItemsNoGps()
AllocItemsNoGps directly allocate items each to their own group -- all fits
func (*SzAlloc) AllocItemsUniqGps ¶
func (sa *SzAlloc) AllocItemsUniqGps()
AllocItemsUniqGps directly allocate items each to their own unique-sized group
func (*SzAlloc) LimitGpNs ¶
func (sa *SzAlloc) LimitGpNs()
LimitGpNs updates group sizes to ensure that the MaxItemsPerGp limit is not exceeded.
func (*SzAlloc) SetSizes ¶
SetSizes sets the max number of groups along each dimension (X, Y), so total number of groups is X*Y, and max items per group, and item sizes to organize -- directly uses the given slice so it should not be something that is reallocated.
func (*SzAlloc) SizesFromIndexes ¶ added in v0.0.10
SizesFromIndexes returns X,Y sizes from X,Y indexes in image.Point into XSizes, YSizes arrays
func (*SzAlloc) UpdateGpMaxSz ¶
func (sa *SzAlloc) UpdateGpMaxSz()
UpdateGpMaxSz updates the group sizes based on actual max sizes of items
Source Files