Selected cursor chrome

internal/scenario/draw.go

@@ -22,6 +22,17 @@ type IsoPt struct {
 func (s *Scenario) Update(screenX, screenY int) error {
 	s.tick += 1
 
+	x, y := ebiten.CursorPosition()
+	screenPos := CartPt{
+		X: float64(s.Viewpoint.X + x),
+		Y: float64(s.Viewpoint.Y + y),
+	}
+
+	s.selectedCell = screenPos.ToISO()
+
+	// TODO: zoom support will need a camera
+	// FIXME: adjust for Z level
+
 	return nil
 }
 
@@ -33,13 +44,15 @@ func (s *Scenario) Draw(screen *ebiten.Image) error {
 
 	sw, sh := screen.Size()
 
-	topLeft := CartPt{X: float64(s.Viewpoint.X), Y: float64(s.Viewpoint.Y)}.ToISO()
-	topLeft.X -= 5 // Ensure we paint to every visible section of the screeen.
-	topLeft.X -= 5 // FIXME: haxxx
+	topLeft := CartPt{
+		X: float64(s.Viewpoint.X - 2*cellWidth), // Ensure all visible cells are rendered
+		Y: float64(s.Viewpoint.Y - 2*cellHeight),
+	}.ToISO()
 
-	bottomRight := CartPt{X: float64(s.Viewpoint.X + sw), Y: float64(s.Viewpoint.Y + sh)}.ToISO()
-	bottomRight.X += 5
-	bottomRight.Y += 5
+	bottomRight := CartPt{
+		X: float64(s.Viewpoint.X + sw + 2*cellHeight),
+		Y: float64(s.Viewpoint.Y + sh + 5*cellHeight), // Z dimension requires it
+	}.ToISO()
 
 	// X+Y is constant for all tiles in a column
 	// X-Y is constant for all tiles in a row
@@ -79,7 +92,7 @@ func (s *Scenario) Draw(screen *ebiten.Image) error {
 	counter := map[string]int{}
 	for _, pt := range toDraw {
 		for z := 0; z <= s.ZIdx; z++ {
-			if err := s.renderCell(pt, z, screen, counter); err != nil {
+			if err := s.renderCell(int(pt.X), int(pt.Y), z, screen, counter); err != nil {
 				return err
 			}
 		}
@@ -87,26 +100,53 @@ func (s *Scenario) Draw(screen *ebiten.Image) error {
 
 	//log.Printf("%#+v", counter)
 
-	return nil
-}
-
-func (s *Scenario) renderCell(pos IsoPt, z int, screen *ebiten.Image, counter map[string]int) error {
-	sprites, err := s.area.SpritesForCell(int(pos.X), int(pos.Y), z)
+	// Finally, draw cursor chrome
+	spr, err := s.specials.Sprite(0)
 	if err != nil {
 		return err
 	}
 
-	iso := ebiten.GeoM{}
-	iso.Translate(-float64(s.Viewpoint.X), -float64(s.Viewpoint.Y))
+	op := ebiten.DrawImageOptions{}
+	op.GeoM = s.geoForCoords(int(s.selectedCell.X), int(s.selectedCell.Y), 0)
+	op.GeoM.Translate(-cellWidthHalf, -cellHeightHalf)
 
-	pix := pos.ToCart()
-	iso.Translate(pix.X, pix.Y)
+	if err := screen.DrawImage(spr.Image, &op); err != nil {
+		return err
+	}
+
+	sx, sy := op.GeoM.Apply(0, 0)
+	ebitenutil.DebugPrintAt(screen, fmt.Sprintf("(%.0f,%.0f)", s.selectedCell.X, s.selectedCell.Y), int(sx), int(sy))
+
+	return nil
+}
+
+func (s *Scenario) geoForCoords(x, y, z int) ebiten.GeoM {
+	geo := ebiten.GeoM{}
+	geo.Translate(-float64(s.Viewpoint.X), -float64(s.Viewpoint.Y))
+
+	pix := IsoPt{X: float64(x), Y: float64(y)}.ToCart()
+	geo.Translate(pix.X, pix.Y)
 
 	// Taking the Z index away *seems* to draw the object in the correct place.
 	// FIXME: There are some artifacts, investigate more
-	iso.Translate(0.0, -float64(z*48.0)) // offset for Z index
+	geo.Translate(0.0, -float64(z*48.0)) // offset for Z index
+
+	return geo
+}
+
+func (s *Scenario) renderCell(x, y, z int, screen *ebiten.Image, counter map[string]int) error {
+	sprites, err := s.area.SpritesForCell(x, y, z)
+	if err != nil {
+		return err
+	}
 
 	// TODO: iso.Scale(e.state.zoom, e.state.zoom) // apply current zoom factor
+	iso := s.geoForCoords(x, y, z)
+
+	// FIXME: this fixed offset is found in jungtil.obj. Drawing with it
+	// means we put everywhere where the iso->pix conversion expects, but
+	// it's a bit nasty. Is there a better way?
+	iso.Translate(-209, -332)
 
 	for _, spr := range sprites {
 		//		if _, ok := counter[spr.ID]; !ok {
@@ -115,20 +155,11 @@ func (s *Scenario) renderCell(pos IsoPt, z int, screen *ebiten.Image, counter ma
 		//		counter[spr.ID] = counter[spr.ID] + 1
 		op := ebiten.DrawImageOptions{GeoM: iso}
 
-		// FIXME: this fixed offset is found in jungtil.obj. Drawing with it
-		// means we put everywhere where the iso->pix conversion expects, but
-		// it's a bit nasty. Is there a better way?
-		op.GeoM.Translate(float64(spr.Rect.Min.X-209), float64(spr.Rect.Min.Y-322))
+		op.GeoM.Translate(float64(spr.Rect.Min.X), float64(spr.Rect.Min.Y))
 
 		if err := screen.DrawImage(spr.Image, &op); err != nil {
 			return err
 		}
-
-		if z == 0 {
-			x, y := op.GeoM.Apply(0, 0)
-			ebitenutil.DebugPrintAt(screen, fmt.Sprintf("(%d,%d)", int(pos.X), int(pos.Y)), int(x), int(y))
-		}
-
 	}
 
 	return nil

internal/scenario/manage.go

@@ -1,10 +1,6 @@
 package scenario
 
 import (
-	//	"image"
-
-	"github.com/hajimehoshi/ebiten"
-
 	"code.ur.gs/lupine/ordoor/internal/maps"
 )
 
@@ -14,12 +10,6 @@ type CellPoint struct {
 }
 
 func (s *Scenario) CellAtCursor() (maps.Cell, CellPoint) {
-	x, y := ebiten.CursorPosition()
-	screenPos := CartPt{X: float64(s.Viewpoint.X + x), Y: float64(s.Viewpoint.Y + y)}
-	isoPos := screenPos.ToISO()
-	// Convert to cell coordinates.
-	// TODO: zoom support will need a camera
-	// FIXME: adjust for Z level
-
-	return s.area.Cell(int(isoPos.X), int(isoPos.Y), 0), CellPoint{IsoPt: isoPos, Z: s.ZIdx}
+	cell := s.area.Cell(int(s.selectedCell.X), int(s.selectedCell.Y), 0)
+	return cell, CellPoint{IsoPt: s.selectedCell, Z: 0}
 }

internal/scenario/scenario.go

@@ -9,10 +9,12 @@ import (
 )
 
 type Scenario struct {
-	area *assetstore.Map
+	area     *assetstore.Map
+	specials *assetstore.Object
 
-	tick int
-	turn int
+	tick         int
+	turn         int
+	selectedCell IsoPt
 
 	// All these must be modified by user actions somehow.
 	// TODO: extract into the idea of a viewport passed to Update / Draw somehow?
@@ -27,6 +29,11 @@ func NewScenario(assets *assetstore.AssetStore, name string) (*Scenario, error)
 		return nil, err
 	}
 
+	specials, err := assets.Object("specials") // FIXME: should this be hardcoded?
+	if err != nil {
+		return nil, err
+	}
+
 	// Eager load sprites. TODO: do we really want to do this?
 	if err := area.LoadSprites(); err != nil {
 		return nil, fmt.Errorf("Eager-loading sprites failed: %v", err)
@@ -34,6 +41,7 @@ func NewScenario(assets *assetstore.AssetStore, name string) (*Scenario, error)
 
 	out := &Scenario{
 		area:      area,
+		specials:  specials,
 		Viewpoint: image.Pt(0, 3000), // FIXME: haxxx
 	}