128 lines
3.2 KiB
Go
128 lines
3.2 KiB
Go
package d2ds1
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import (
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2datautils"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2enum"
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)
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const (
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prop1Bitmask = 0x000000FF
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prop1Offset = 0
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prop1Length = 8
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sequenceBitmask = 0x00003F00
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sequenceOffset = 8
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sequenceLength = 6
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unknown1Bitmask = 0x000FC000
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unknown1Offset = 14
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unknown1Length = 6
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styleBitmask = 0x03F00000
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styleOffset = 20
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styleLength = 6
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unknown2Bitmask = 0x7C000000
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unknown2Offset = 26
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unknown2Length = 5
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hiddenBitmask = 0x80000000
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hiddenOffset = 31
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hiddenLength = 1
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)
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type tileCommonFields struct {
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Prop1 byte
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Sequence byte
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Unknown1 byte
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Style byte
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Unknown2 byte
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HiddenBytes byte
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RandomIndex byte
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YAdjust int
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}
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type tileFloorShadowFields struct {
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Animated bool
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}
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type tileSubstitutionFields struct {
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Substitution uint32 // unknown
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}
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type tileWallFields struct {
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Type d2enum.TileType
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Zero byte
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}
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// Tile represents a tile record in a DS1 file.
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type Tile struct {
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tileCommonFields
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tileSubstitutionFields
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tileWallFields
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tileFloorShadowFields
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}
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// Hidden returns if wall is hidden
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func (t *Tile) Hidden() bool {
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return t.HiddenBytes > 0
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}
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// DecodeWall decodes as a wall record
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func (t *Tile) DecodeWall(dw uint32) {
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t.Prop1 = byte((dw & prop1Bitmask) >> prop1Offset)
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t.Sequence = byte((dw & sequenceBitmask) >> sequenceOffset)
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t.Unknown1 = byte((dw & unknown1Bitmask) >> unknown1Offset)
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t.Style = byte((dw & styleBitmask) >> styleOffset)
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t.Unknown2 = byte((dw & unknown2Bitmask) >> unknown2Offset)
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t.HiddenBytes = byte((dw & hiddenBitmask) >> hiddenOffset)
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}
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// EncodeWall adds wall's record's bytes into stream writer given
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func (t *Tile) EncodeWall(sw *d2datautils.StreamWriter) {
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sw.PushBits32(uint32(t.Prop1), prop1Length)
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sw.PushBits32(uint32(t.Sequence), sequenceLength)
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sw.PushBits32(uint32(t.Unknown1), unknown1Length)
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sw.PushBits32(uint32(t.Style), styleLength)
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sw.PushBits32(uint32(t.Unknown2), unknown2Length)
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sw.PushBits32(uint32(t.HiddenBytes), hiddenLength)
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}
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func (t *Tile) decodeFloorShadow(dw uint32) {
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t.Prop1 = byte((dw & prop1Bitmask) >> prop1Offset)
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t.Sequence = byte((dw & sequenceBitmask) >> sequenceOffset)
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t.Unknown1 = byte((dw & unknown1Bitmask) >> unknown1Offset)
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t.Style = byte((dw & styleBitmask) >> styleOffset)
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t.Unknown2 = byte((dw & unknown2Bitmask) >> unknown2Offset)
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t.HiddenBytes = byte((dw & hiddenBitmask) >> hiddenOffset)
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}
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func (t *Tile) encodeFloorShadow(sw *d2datautils.StreamWriter) {
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sw.PushBits32(uint32(t.Prop1), prop1Length)
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sw.PushBits32(uint32(t.Sequence), sequenceLength)
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sw.PushBits32(uint32(t.Unknown1), unknown1Length)
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sw.PushBits32(uint32(t.Style), styleLength)
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sw.PushBits32(uint32(t.Unknown2), unknown2Length)
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sw.PushBits32(uint32(t.HiddenBytes), hiddenLength)
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}
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// DecodeFloor decodes as a floor record
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func (t *Tile) DecodeFloor(dw uint32) {
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t.decodeFloorShadow(dw)
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}
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// EncodeFloor adds Floor's bits to stream writer given
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func (t *Tile) EncodeFloor(sw *d2datautils.StreamWriter) {
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t.encodeFloorShadow(sw)
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}
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// DecodeShadow decodes as a shadow record
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func (t *Tile) DecodeShadow(dw uint32) {
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t.decodeFloorShadow(dw)
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}
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// EncodeShadow adds shadow's bits to stream writer given
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func (t *Tile) EncodeShadow(sw *d2datautils.StreamWriter) {
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t.encodeFloorShadow(sw)
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}
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