ml
86 lines
3.0 KiB
Go
86 lines
3.0 KiB
Go
package level
|
|
|
|
// FloorInfo describes the properties of a floor.
|
|
type FloorInfo byte
|
|
|
|
// AbsoluteHeight returns the floor height in range of [0..TileHeightUnitMax-1].
|
|
func (info FloorInfo) AbsoluteHeight() TileHeightUnit {
|
|
return TileHeightUnit(info & 0x1F)
|
|
}
|
|
|
|
// WithAbsoluteHeight returns a floor info that specifies the given absolute height.
|
|
// The allowed range is [0..TileHeightUnitMax-1].
|
|
func (info FloorInfo) WithAbsoluteHeight(value TileHeightUnit) FloorInfo {
|
|
return FloorInfo(byte(info&0xE0) | (byte(value) & 0x1F))
|
|
}
|
|
|
|
// TextureRotations returns the rotation steps to apply for the floor texture. Valid range: [0..3].
|
|
func (info FloorInfo) TextureRotations() int {
|
|
return int(info&0x60) >> 5
|
|
}
|
|
|
|
// WithTextureRotations returns a floor info that specifies the given the rotation steps.
|
|
// The provided value is normalized to the valid range.
|
|
func (info FloorInfo) WithTextureRotations(value int) FloorInfo {
|
|
normalized := (4 + (value % 4)) % 4
|
|
return FloorInfo(byte(info&^0x60) | byte(normalized)<<5)
|
|
}
|
|
|
|
// HasHazard returns true if the hazard flag is set.
|
|
func (info FloorInfo) HasHazard() bool {
|
|
return (byte(info) & 0x80) != 0
|
|
}
|
|
|
|
// WithHazard returns a floor info with the hazard flag set according to given value.
|
|
func (info FloorInfo) WithHazard(value bool) FloorInfo {
|
|
var flag byte
|
|
if value {
|
|
flag = 0x80
|
|
}
|
|
return FloorInfo(byte(info&^0x80) | flag)
|
|
}
|
|
|
|
// CeilingInfo describes the properties of a ceiling.
|
|
type CeilingInfo byte
|
|
|
|
// AbsoluteHeight returns the height (from minimum floor height zero) of the ceiling.
|
|
// Internally, this value is stored "from maximum ceiling height 32" down.
|
|
// The range is [1..TileHeightUnitMax].
|
|
func (info CeilingInfo) AbsoluteHeight() TileHeightUnit {
|
|
value := info & 0x1F
|
|
return TileHeightUnit(byte(TileHeightUnitMax) - byte(value))
|
|
}
|
|
|
|
// WithAbsoluteHeight returns a ceiling info that specifies the given absolute height.
|
|
// Internally, this value is stored "from maximum ceiling height 32" down.
|
|
// The allowed range is [1..TileHeightUnitMax].
|
|
func (info CeilingInfo) WithAbsoluteHeight(value TileHeightUnit) CeilingInfo {
|
|
return CeilingInfo(byte(info&0xE0) | (byte(TileHeightUnitMax-value) & 0x1F))
|
|
}
|
|
|
|
// TextureRotations returns the rotation steps to apply for the ceiling texture. Valid range: [0..3].
|
|
func (info CeilingInfo) TextureRotations() int {
|
|
return int(info&0x60) >> 5
|
|
}
|
|
|
|
// WithTextureRotations returns a ceiling info that specifies the given the rotation steps.
|
|
// The provided value is normalized to the valid range.
|
|
func (info CeilingInfo) WithTextureRotations(value int) CeilingInfo {
|
|
normalized := (4 + (value % 4)) % 4
|
|
return CeilingInfo(byte(info&^0x60) | byte(normalized)<<5)
|
|
}
|
|
|
|
// HasHazard returns true if the hazard flag is set.
|
|
func (info CeilingInfo) HasHazard() bool {
|
|
return (byte(info) & 0x80) != 0
|
|
}
|
|
|
|
// WithHazard returns a ceiling info with the hazard flag set according to given value.
|
|
func (info CeilingInfo) WithHazard(value bool) CeilingInfo {
|
|
var flag byte
|
|
if value {
|
|
flag = 0x80
|
|
}
|
|
return CeilingInfo(byte(info&^0x80) | flag)
|
|
}
|