Zsolt Tasnadi
8921f02821
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77 lines
2.1 KiB
Lua
77 lines
2.1 KiB
Lua
--- @section Mouse
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local _mx, _my = 0, 0
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local _mleft, _mleft_prev = false, false
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local _consumed = false
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--- Updates mouse state. Call once per frame.
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--- @within Mouse
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function Mouse.update()
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_mleft_prev = _mleft
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_consumed = false
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local mt = {mouse()}
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_mx, _my, _mleft = mt[1], mt[2], mt[3]
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end
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--- Returns current mouse X position.
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--- @within Mouse
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function Mouse.x() return _mx end
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--- Returns current mouse Y position.
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--- @within Mouse
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function Mouse.y() return _my end
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--- Returns true if the mouse button was just pressed this frame (and not yet consumed).
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--- @within Mouse
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function Mouse.clicked() return _mleft and not _mleft_prev and not _consumed end
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--- Returns true if the mouse button is held down.
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--- @within Mouse
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function Mouse.held() return _mleft end
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--- Marks the current click as consumed so Mouse.clicked() won't fire again this frame.
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--- @within Mouse
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function Mouse.consume() _consumed = true end
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--- Returns true if the mouse is within the given rectangle.
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--- @within Mouse
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--- @param x number Left edge.
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--- @param y number Top edge.
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--- @param w number Width.
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--- @param h number Height.
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function Mouse.in_rect(x, y, w, h)
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return _mx >= x and _mx < x + w and _my >= y and _my < y + h
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end
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--- Returns true if the mouse is within the given circle.
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--- @within Mouse
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--- @param cx number Center x.
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--- @param cy number Center y.
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--- @param r number Radius.
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function Mouse.in_circle(cx, cy, r)
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local dx = _mx - cx
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local dy = _my - cy
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return (dx * dx + dy * dy) <= (r * r)
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end
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--- Returns true if the mouse was clicked inside the given rectangle, and consumes the click.
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--- @within Mouse
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--- @param rect table A table with fields: x, y, w, h.
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function Mouse.zone(rect)
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if Mouse.clicked() and Mouse.in_rect(rect.x, rect.y, rect.w, rect.h) then
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Mouse.consume()
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return true
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end
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return false
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end
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--- Returns true if the mouse was clicked inside the given circle, and consumes the click.
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--- @within Mouse
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--- @param circle table A table with fields: x, y, r.
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function Mouse.zone_circle(circle)
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if Mouse.clicked() and Mouse.in_circle(circle.x, circle.y, circle.r) then
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Mouse.consume()
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return true
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end
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return false
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end
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