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toucheditor.go
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/
toucheditor.go
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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package input
import (
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/vector"
"github.com/divVerent/aaaaxy/internal/flag"
m "github.com/divVerent/aaaaxy/internal/math"
"github.com/divVerent/aaaaxy/internal/palette"
)
type editMode int
const (
editNone editMode = iota
editMin
editBoth
editMax
)
type touchEditInfo struct {
active bool
frames int
rect *m.Rect
xMode editMode
yMode editMode
startPos m.Pos
startRect m.Rect
}
const (
gridSize = 8
touchToggleActionFrames = 120
)
var (
touchEditPad bool = false
touchReservedArea = m.Rect{
Origin: m.Pos{X: 192, Y: 64},
Size: m.Delta{DX: 640 - 192 - 192, DY: 360 - 64},
}
snaps = []m.Delta{
// Distance: 0
{DX: 0, DY: 0},
// Distance: 1, always enumerated clockwise starting at 12.
{DX: 0, DY: -1},
{DX: 1, DY: 0},
{DX: 0, DY: 1},
{DX: -1, DY: 0},
// Distance: sqrt(2), always enumerated clockwise starting at 12.
{DX: 1, DY: -1},
{DX: 1, DY: 1},
{DX: -1, DY: 1},
{DX: -1, DY: -1},
// Distance: 2, always enumerated clockwise starting at 12.
{DX: 0, DY: -2},
{DX: 2, DY: 0},
{DX: 0, DY: 2},
{DX: -2, DY: 0},
// Distance: sqrt(5), always enumerated clockwise starting at 12.
{DX: 1, DY: -2},
{DX: 2, DY: -1},
{DX: 2, DY: 1},
{DX: 1, DY: 2},
{DX: -1, DY: 2},
{DX: -2, DY: 1},
{DX: -2, DY: -1},
{DX: -1, DY: -2},
// Distance: sqrt(8), always enumerated clockwise starting at 12.
{DX: 2, DY: -2},
{DX: 2, DY: 2},
{DX: -2, DY: 2},
{DX: -2, DY: -2},
}
)
func touchEditMode(g int) editMode {
switch g {
case 0:
return editMin
case 3:
return editMax
default:
return editNone
}
}
func touchEditOrigin(mode editMode, o int, dp int) int {
switch mode {
case editMin, editBoth:
return o + dp
default:
return o
}
}
func touchEditSize(mode editMode, s int, dp int) int {
switch mode {
case editMin:
return s - dp
case editMax:
return s + dp
default:
return s
}
}
func touchEditAllowed(rect *m.Rect, replacement m.Rect, gameWidth, gameHeight int) bool {
if replacement.Origin.X < 0 || replacement.Origin.Y < 0 {
return false
}
if replacement.Size.DX < 64 || replacement.Size.DY < 64 {
return false
}
if replacement.OppositeCorner().X >= gameWidth || replacement.OppositeCorner().Y >= gameHeight {
return false
}
if touchReservedArea.Delta(replacement).IsZero() {
return false
}
for _, i := range impulses {
if i.touchRect == nil || i.touchRect.Size.IsZero() || i.touchRect == rect {
continue
}
if replacement.Delta(*i.touchRect).IsZero() {
return false
}
}
return true
}
func touchToggleActionButton(gameWidth, gameHeight int) {
if !Action.touchRect.Size.IsZero() {
Action.touchRect.Size = m.Delta{}
return
}
// Start with the square inscribed into Jump.
jumpSize := Jump.touchRect.Size
for range []int{0, 1} {
// Find an empty place close to Jump, and make it the same size.
for _, neighbor := range []m.Delta{
{DX: 1, DY: 0},
{DX: 0, DY: -1},
{DX: -1, DY: 0},
{DX: 0, DY: 1},
} {
initialSize := jumpSize
initialOrigin := Jump.touchRect.Origin
// Minimize size in the direction moving in.
if neighbor.DX == 0 {
initialSize.DY = 64
} else {
initialSize.DX = 64
}
// Set initial origin.
if neighbor.DX < 0 {
initialOrigin.X -= initialSize.DX
} else if neighbor.DX > 0 {
initialOrigin.X += jumpSize.DX
} else if neighbor.DY < 0 {
initialOrigin.Y -= initialSize.DY
} else if neighbor.DY > 0 {
initialOrigin.Y += jumpSize.DY
}
newRect := m.Rect{
Origin: initialOrigin,
Size: initialSize,
}
if touchEditAllowed(Action.touchRect, newRect, gameWidth, gameHeight) {
sizeStep := neighbor.Mul(gridSize)
originStep := m.Delta{}
if sizeStep.DX < 0 {
originStep.DX = sizeStep.DX
sizeStep.DX = -sizeStep.DX
}
if sizeStep.DY < 0 {
originStep.DY = sizeStep.DY
sizeStep.DY = -sizeStep.DY
}
// Expand as far as we can.
for {
expandedRect := m.Rect{
Origin: newRect.Origin.Add(originStep),
Size: newRect.Size.Add(sizeStep),
}
if !touchEditAllowed(Action.touchRect, expandedRect, gameWidth, gameHeight) {
break
}
newRect = expandedRect
}
*Action.touchRect = newRect
return
}
}
// Didn't work? Swap size and try again.
jumpSize.DX, jumpSize.DY = jumpSize.DY, jumpSize.DX
}
}
func touchEditUpdate(gameWidth, gameHeight int) bool {
if !touchEditPad {
for _, t := range touches {
t.edit.active = false
}
return false
}
eatTouches := false
for _, t := range touches {
if !t.hit {
continue
}
if !touchReservedArea.DeltaPos(t.pos).IsZero() {
eatTouches = true
}
if t.edit.active {
// Move what is being hit.
t.edit.frames++
if t.edit.rect == nil {
// Hold for some time to toggle action button existence.
if t.edit.frames == touchToggleActionFrames {
touchToggleActionButton(gameWidth, gameHeight)
}
continue
}
newRect := *t.edit.rect
// The truncate rounding in m.Div slightly prefers the same coordinate. Good.
dx := gridSize * m.Div(t.pos.X-t.edit.startPos.X, gridSize)
dy := gridSize * m.Div(t.pos.Y-t.edit.startPos.Y, gridSize)
for _, snap := range snaps {
newRect.Origin.X = touchEditOrigin(t.edit.xMode, t.edit.startRect.Origin.X, dx+gridSize*snap.DX)
newRect.Origin.Y = touchEditOrigin(t.edit.yMode, t.edit.startRect.Origin.Y, dy+gridSize*snap.DY)
newRect.Size.DX = touchEditSize(t.edit.xMode, t.edit.startRect.Size.DX, dx+gridSize*snap.DX)
newRect.Size.DY = touchEditSize(t.edit.yMode, t.edit.startRect.Size.DY, dy+gridSize*snap.DY)
if touchEditAllowed(t.edit.rect, newRect, gameWidth, gameHeight) {
*t.edit.rect = newRect
break
}
}
} else {
t.edit.active = true
t.edit.rect = nil
t.edit.startPos = t.pos
// Identify what is hit, set flag, xMode, yMode appropriately.
// Just set active if nothing is hit.
for _, i := range impulses {
if i.touchRect == nil || i.touchRect.Size.IsZero() {
continue
}
gx, gy := i.touchRect.GridPos(t.pos, 4, 4)
if gx < 0 || gy < 0 || gx >= 4 || gy >= 4 {
continue
}
// Hit, so start active this rectangle.
t.edit.rect = i.touchRect
t.edit.startRect = *t.edit.rect
t.edit.xMode = touchEditMode(gx)
t.edit.yMode = touchEditMode(gy)
if t.edit.xMode == editNone && t.edit.yMode == editNone {
t.edit.xMode = editBoth
t.edit.yMode = editBoth
}
break
}
}
}
return eatTouches
}
func touchEditDraw(screen *ebiten.Image) {
if !touchEditPad {
return
}
for _, i := range impulses {
if i.touchRect == nil || i.touchRect.Size.IsZero() {
continue
}
boxColor := palette.EGA(palette.White, 255)
vector.DrawFilledRect(screen, float32(i.touchRect.Origin.X), float32(i.touchRect.Origin.Y), float32(i.touchRect.Size.DX), float32(i.touchRect.Size.DY), boxColor, false)
innerColor := palette.EGA(palette.DarkGrey, 255)
vector.DrawFilledRect(screen, float32(i.touchRect.Origin.X+1), float32(i.touchRect.Origin.Y+1), float32(i.touchRect.Size.DX-2), float32(i.touchRect.Size.DY-2), innerColor, false)
}
gridColor := palette.EGA(palette.LightGrey, 32)
sz := screen.Bounds().Size()
for x := 0; x < sz.X/gridSize; x++ {
for y := 0; y < sz.Y/gridSize; y++ {
r := m.Rect{
Origin: m.Pos{X: x * gridSize, Y: y * gridSize},
Size: m.Delta{DX: 8, DY: 8},
}
if touchReservedArea.Delta(r).IsZero() {
continue
}
vector.DrawFilledRect(screen, float32(x*gridSize+1), float32(y*gridSize+1), 6, 6, gridColor, false)
}
}
touchPadDraw(screen)
}
func touchSetEditor(want bool) {
if touchEditPad == want {
return
}
touchCancelClicks()
touchEditPad = want
}
func TouchResetEditor() {
flag.ResetFlagToDefault("touch_rect_left")
flag.ResetFlagToDefault("touch_rect_right")
flag.ResetFlagToDefault("touch_rect_down")
flag.ResetFlagToDefault("touch_rect_up")
flag.ResetFlagToDefault("touch_rect_jump")
flag.ResetFlagToDefault("touch_rect_action")
flag.ResetFlagToDefault("touch_rect_exit")
}