collision death state and basic HUD

1 files changed, 146 insertions, 0 deletions

diff --git a/hud.lua b/hud.lua
new file mode 100644
index 0000000..ce877bb
--- /dev/null
+++ b/hud.lua
@@ -0,0 +1,146 @@
+local Textbox = require("textbox")
+
+local HUD = {}
+HUD.__index = HUD
+
+HUD.slots = {
+    { enabled = false },
+    { enabled = false },
+    { enabled = false },
+    { enabled = false },
+}
+
+local SLOT_SIZE = 16
+local SLOT_SPACING = 8
+local LOREM = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
+
+local function createMissingTexture()
+    local size = SLOT_SIZE
+    local half = size / 2
+    local imgData = love.image.newImageData(size, size)
+    for y = 0, size - 1 do
+        for x = 0, size - 1 do
+            local inBlack = (x < half and y < half) or (x >= half and y >= half)
+            if inBlack then
+                imgData:setPixel(x, y, 0, 0, 0, 1)
+            else
+                imgData:setPixel(x, y, 1, 0, 1, 1)
+            end
+        end
+    end
+    local img = love.graphics.newImage(imgData)
+    img:setFilter("nearest", "nearest")
+    return img
+end
+
+function HUD:new()
+    local self = setmetatable({}, HUD)
+    self.missingTexture = createMissingTexture()
+    self.textbox = Textbox:new()
+    self.hoveredSlot = nil
+    self.slotRects = {}
+    self.screenW = 0
+    self.screenH = 0
+    self.drawScale = 1
+    return self
+end
+
+function HUD:computeSlotRects(screenW, screenH, drawScale)
+    local slotW = SLOT_SIZE * drawScale
+    local slotH = SLOT_SIZE * drawScale
+    local spacing = SLOT_SPACING * drawScale
+    local totalW = 4 * slotW + 3 * spacing
+    local startX = math.floor((screenW - totalW) / 2)
+    local startY = math.floor(screenH / 2 - slotH / 2)
+    local rects = {}
+    for i = 1, 4 do
+        rects[i] = {
+            x = startX + (i - 1) * (slotW + spacing),
+            y = startY,
+            w = slotW,
+            h = slotH,
+        }
+    end
+    return rects
+end
+
+function HUD:update(dt, screenW, screenH, drawScale)
+    self.screenW = screenW
+    self.screenH = screenH
+    self.drawScale = drawScale
+    self.slotRects = self:computeSlotRects(screenW, screenH, drawScale)
+
+    local mx, my = love.mouse.getPosition()
+    local prevHovered = self.hoveredSlot
+    self.hoveredSlot = nil
+    for i, rect in ipairs(self.slotRects) do
+        if mx >= rect.x and mx < rect.x + rect.w
+           and my >= rect.y and my < rect.y + rect.h then
+            self.hoveredSlot = i
+            break
+        end
+    end
+
+    if self.hoveredSlot and self.hoveredSlot ~= prevHovered then
+        local rect = self.slotRects[self.hoveredSlot]
+        local centerX = screenW / 2
+        local topY = rect.y + rect.h + 8 * drawScale
+        self.textbox:show(LOREM, { centerX, topY, "center" }, "show", {
+            fontSize = 16,
+            centeredText = true,
+            wrapToFit = true,
+            maxChars = 40,
+        })
+        self.textbox.y = topY + self.textbox.height / 2
+    elseif not self.hoveredSlot and prevHovered then
+        self.textbox:hide()
+    end
+
+    self.textbox:update(dt)
+end
+
+function HUD:mousepressed(mx, my, button)
+    if button ~= 1 then return end
+    for i, rect in ipairs(self.slotRects) do
+        if mx >= rect.x and mx < rect.x + rect.w
+           and my >= rect.y and my < rect.y + rect.h then
+            HUD.slots[i].enabled = not HUD.slots[i].enabled
+            break
+        end
+    end
+end
+
+function HUD:draw()
+    local screenW = self.screenW
+    local screenH = self.screenH
+    local drawScale = self.drawScale
+
+    love.graphics.setColor(0, 0, 0, 0.4)
+    love.graphics.rectangle("fill", 0, 0, screenW, screenH)
+
+    for i, rect in ipairs(self.slotRects) do
+        love.graphics.setColor(1, 1, 1, 1)
+        love.graphics.draw(self.missingTexture, rect.x, rect.y, 0, drawScale, drawScale)
+
+        if HUD.slots[i].enabled then
+            love.graphics.setColor(0, 1, 0, 0.3)
+            love.graphics.rectangle("fill", rect.x, rect.y, rect.w, rect.h)
+        end
+
+        if self.hoveredSlot == i then
+            love.graphics.setColor(1, 1, 0, 1)
+            love.graphics.setLineWidth(2)
+        else
+            love.graphics.setColor(1, 1, 1, 0.5)
+            love.graphics.setLineWidth(1)
+        end
+        love.graphics.rectangle("line", rect.x, rect.y, rect.w, rect.h)
+    end
+
+    love.graphics.setLineWidth(1)
+    love.graphics.setColor(1, 1, 1, 1)
+
+    self.textbox:draw()
+end
+
+return HUD