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prosperon/examples/chess/board_view.cm
2026-02-25 22:13:42 -06:00

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var shape = use('shape2d')
var text2d = use('text2d')
var S = 60
var GW = S * 8
var GH = S * 8
var light_color = {r: 0.93, g: 0.93, b: 0.85, a: 1}
var dark_color = {r: 0.45, g: 0.55, b: 0.35, a: 1}
var select_color = {r: 1, g: 0.84, b: 0, a: 1}
var valid_color = {r: 0.6, g: 0.8, b: 0.4, a: 1}
var hover_color = {r: 0.8, g: 0.85, b: 0.6, a: 1}
var piece_letter = {
king: "K", queen: "Q", rook: "R",
bishop: "B", knight: "N", pawn: "P"
}
var white_text = {r: 1, g: 1, b: 1, a: 1}
var black_text = {r: 0.1, g: 0.1, b: 0.1, a: 1}
var board_shapes = []
var piece_labels = {}
var status_label = null
var next_id = 0
function init(grid) {
var bx = 0, by = 0, row = null, col = null
for (by = 0; by < 8; by++) {
row = []
for (bx = 0; bx < 8; bx++) {
col = ((bx + by) & 1) ? dark_color : light_color
push(row, shape.rect({
pos: {x: bx * S + S / 2, y: by * S + S / 2},
width: S, height: S,
fill: {r: col.r, g: col.g, b: col.b, a: col.a},
plane: 'game', layer: 0
}))
}
push(board_shapes, row)
}
next_id = 0
grid.each(function(p) {
next_id++
p._id = next_id
piece_labels[text(next_id)] = text2d({
text: piece_letter[p.kind],
pos: {x: p.coord[0] * S + S / 2, y: p.coord[1] * S + S / 2},
size: 36,
color: (p.colour == 'white') ? white_text : black_text,
plane: 'game', layer: 1
})
})
status_label = text2d({
text: "White's turn", pos: {x: 10, y: GH - 20},
plane: 'hud', size: 14, color: {r: 1, g: 1, b: 1, a: 1}
})
}
function sync_pieces(grid) {
var keys = array(piece_labels)
var i = 0
for (i = 0; i < length(keys); i++) {
piece_labels[keys[i]].visible = false
}
grid.each(function(p) {
var lbl = piece_labels[text(p._id)]
if (!lbl) return
lbl.pos.x = p.coord[0] * S + S / 2
lbl.pos.y = p.coord[1] * S + S / 2
lbl.visible = true
})
}
function rebuild_pieces(grid) {
var keys = array(piece_labels)
var i = 0
for (i = 0; i < length(keys); i++) {
piece_labels[keys[i]].visible = false
}
grid.each(function(p) {
var key = text(p._id)
var lbl = piece_labels[key]
if (!lbl) {
lbl = text2d({
text: piece_letter[p.kind],
pos: {x: p.coord[0] * S + S / 2, y: p.coord[1] * S + S / 2},
size: 36,
color: (p.colour == 'white') ? white_text : black_text,
plane: 'game', layer: 1
})
piece_labels[key] = lbl
}
lbl.pos.x = p.coord[0] * S + S / 2
lbl.pos.y = p.coord[1] * S + S / 2
lbl.text = piece_letter[p.kind]
lbl.visible = true
})
}
function highlight(selectPos, validMoves, hover_gx, hover_gy) {
var x = 0, y = 0, col = null
for (y = 0; y < 8; y++) {
for (x = 0; x < 8; x++) {
col = ((x + y) & 1) ? dark_color : light_color
board_shapes[y][x].fill = {r: col.r, g: col.g, b: col.b, a: col.a}
}
}
if (hover_gx >= 0 && hover_gx < 8 && hover_gy >= 0 && hover_gy < 8) {
board_shapes[hover_gy][hover_gx].fill = {
r: hover_color.r, g: hover_color.g, b: hover_color.b, a: hover_color.a
}
}
if (!selectPos) return
board_shapes[selectPos[1]][selectPos[0]].fill = {
r: select_color.r, g: select_color.g, b: select_color.b, a: select_color.a
}
var i = 0, m = null
for (i = 0; i < length(validMoves); i++) {
m = validMoves[i]
board_shapes[m[1]][m[0]].fill = {
r: valid_color.r, g: valid_color.g, b: valid_color.b, a: valid_color.a
}
}
}
function set_status(msg) {
status_label.text = msg
}
return {
S: S, GW: GW, GH: GH,
init: init,
sync_pieces: sync_pieces,
rebuild_pieces: rebuild_pieces,
highlight: highlight,
set_status: set_status
}