1
1
mirror of https://github.com/OpenDiablo2/OpenDiablo2 synced 2024-10-31 16:27:18 -04:00
OpenDiablo2/d2render/animated_entity.go
Alex Yatskov 49b9a190f2 Render to surface, not ebiten texture (#268)
* Render to surface, not ebiten texture

* Fix debug text
2019-12-28 16:46:08 -05:00

193 lines
5.4 KiB
Go

package d2render
import (
"math"
"math/rand"
"github.com/OpenDiablo2/D2Shared/d2common/d2enum"
"github.com/OpenDiablo2/D2Shared/d2data/d2datadict"
"github.com/OpenDiablo2/D2Shared/d2helper"
"github.com/OpenDiablo2/OpenDiablo2/d2asset"
"github.com/OpenDiablo2/OpenDiablo2/d2render/d2surface"
)
// AnimatedEntity represents an entity on the map that can be animated
type AnimatedEntity struct {
LocationX float64
LocationY float64
TileX, TileY int // Coordinates of the tile the unit is within
subcellX, subcellY float64 // Subcell coordinates within the current tile
animationMode string
weaponClass string
direction int
offsetX, offsetY int32
TargetX float64
TargetY float64
action int32
repetitions int
composite *d2asset.Composite
}
// CreateAnimatedEntity creates an instance of AnimatedEntity
func CreateAnimatedEntity(x, y int32, object *d2datadict.ObjectLookupRecord, palettePath string) (*AnimatedEntity, error) {
composite, err := d2asset.LoadComposite(object, palettePath)
if err != nil {
return nil, err
}
entity := &AnimatedEntity{composite: composite}
entity.LocationX = float64(x)
entity.LocationY = float64(y)
entity.TargetX = entity.LocationX
entity.TargetY = entity.LocationY
entity.TileX = int(entity.LocationX / 5)
entity.TileY = int(entity.LocationY / 5)
entity.subcellX = 1 + math.Mod(entity.LocationX, 5)
entity.subcellY = 1 + math.Mod(entity.LocationY, 5)
return entity, nil
}
// SetMode changes the graphical mode of this animated entity
func (v *AnimatedEntity) SetMode(animationMode, weaponClass string, direction int) error {
v.animationMode = animationMode
v.direction = direction
err := v.composite.SetMode(animationMode, weaponClass, direction)
if err != nil {
err = v.composite.SetMode(animationMode, "HTH", direction)
}
return err
}
// If an npc has a path to pause at each location.
// Waits for animation to end and all repetitions to be exhausted.
func (v AnimatedEntity) Wait() bool {
return v.composite.GetPlayedCount() > v.repetitions
}
// Render draws this animated entity onto the target
func (v *AnimatedEntity) Render(target *d2surface.Surface) {
target.PushTranslation(
int(v.offsetX)+int((v.subcellX-v.subcellY)*16),
int(v.offsetY)+int(((v.subcellX+v.subcellY)*8)-5),
)
defer target.Pop()
v.composite.Render(target)
}
func (v AnimatedEntity) GetDirection() int {
return v.direction
}
func (v *AnimatedEntity) getStepLength(tickTime float64) (float64, float64) {
speed := 6.0
length := tickTime * speed
angle := 359 - d2helper.GetAngleBetween(
v.LocationX,
v.LocationY,
v.TargetX,
v.TargetY,
)
radians := (math.Pi / 180.0) * float64(angle)
oneStepX := length * math.Cos(radians)
oneStepY := length * math.Sin(radians)
return oneStepX, oneStepY
}
func (v *AnimatedEntity) Step(tickTime float64) {
stepX, stepY := v.getStepLength(tickTime)
if d2helper.AlmostEqual(v.LocationX, v.TargetX, stepX) {
v.LocationX = v.TargetX
}
if d2helper.AlmostEqual(v.LocationY, v.TargetY, stepY) {
v.LocationY = v.TargetY
}
if v.LocationX != v.TargetX {
v.LocationX += stepX
}
if v.LocationY != v.TargetY {
v.LocationY += stepY
}
v.subcellX = 1 + math.Mod(v.LocationX, 5)
v.subcellY = 1 + math.Mod(v.LocationY, 5)
v.TileX = int(v.LocationX / 5)
v.TileY = int(v.LocationY / 5)
if v.LocationX == v.TargetX && v.LocationY == v.TargetY {
v.repetitions = 3 + rand.Intn(5)
newAnimationMode := d2enum.AnimationModeObjectNeutral
// TODO: Figure out what 1-3 are for, 4 is correct.
switch v.action {
case 1:
newAnimationMode = d2enum.AnimationModeMonsterNeutral
case 2:
newAnimationMode = d2enum.AnimationModeMonsterNeutral
case 3:
newAnimationMode = d2enum.AnimationModeMonsterNeutral
case 4:
newAnimationMode = d2enum.AnimationModeMonsterSkill1
v.repetitions = 0
}
v.composite.ResetPlayedCount()
if v.animationMode != newAnimationMode.String() {
v.SetMode(newAnimationMode.String(), v.weaponClass, v.direction)
}
}
}
// SetTarget sets target coordinates and changes animation based on proximity and direction
func (v *AnimatedEntity) SetTarget(tx, ty float64, action int32) {
angle := 359 - d2helper.GetAngleBetween(
v.LocationX,
v.LocationY,
tx,
ty,
)
v.action = action
// TODO: Check if is in town and if is player.
newAnimationMode := d2enum.AnimationModeMonsterWalk.String()
if tx != v.LocationX || ty != v.LocationY {
v.TargetX, v.TargetY = tx, ty
newAnimationMode = d2enum.AnimationModeMonsterWalk.String()
}
newDirection := angleToDirection(float64(angle), v.composite.GetDirectionCount())
if newDirection != v.GetDirection() || newAnimationMode != v.animationMode {
v.SetMode(newAnimationMode, v.weaponClass, newDirection)
}
}
func angleToDirection(angle float64, numberOfDirections int) int {
if numberOfDirections == 0 {
return 0
}
degreesPerDirection := 360.0 / float64(numberOfDirections)
offset := 45.0 - (degreesPerDirection / 2)
newDirection := int((angle - offset) / degreesPerDirection)
if newDirection >= numberOfDirections {
newDirection = newDirection - numberOfDirections
} else if newDirection < 0 {
newDirection = numberOfDirections + newDirection
}
return newDirection
}
func (v *AnimatedEntity) Advance(elapsed float64) {
v.composite.Advance(elapsed)
}
func (v *AnimatedEntity) GetPosition() (float64, float64) {
return float64(v.TileX), float64(v.TileY)
}