73 lines
2.4 KiB
Lua
73 lines
2.4 KiB
Lua
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-- The base Image class.
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Image = Object:extend()
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function Image:init(asset_name)
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self.image = love.graphics.newImage("assets/images/" .. asset_name .. ".png")
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self.w = self.image:getWidth()
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self.h = self.image:getHeight()
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end
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function Image:draw(x, y, r, sx, sy, ox, oy, color)
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local _r, g, b, a
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if color then
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_r, g, b, a = love.graphics.getColor()
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graphics.set_color(color)
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end
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love.graphics.draw(self.image, x, y, r or 0, sx or 1, sy or sx or 1, self.w/2 + (ox or 0), self.h/2 + (oy or 0))
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if color then love.graphics.setColor(_r, g, b, a) end
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end
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-- The base Quad class. Useful for loading pieces of images as independent Image objects. Every function that takes in an Image also takes in a Quad.
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Quad = Object:extend()
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function Quad:init(image, tile_w, tile_h, tile_coordinates)
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self.image = image
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self.quad = love.graphics.newQuad((tile_coordinates[1]-1)*tile_w, (tile_coordinates[2]-1)*tile_h, tile_w, tile_h, self.image.w, self.image.h)
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self.w, self.h = tile_w, tile_h
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end
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function Quad:draw(x, y, r, sx, sy, ox, oy)
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love.graphics.draw(self.image.image, self.quad, x, y, r or 0, sx or 1, sy or sx or 1, self.w/2 + (ox or 0), self.h/2 + (oy or 0))
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end
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-- A linear gradient image.
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-- The first argument is the direction of the gradient and can be either 'horizontal' or 'vertical'.
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GradientImage = Object:extend()
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function GradientImage:init(direction, ...)
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local colors = {...}
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local mesh_data = {}
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if direction == "horizontal" then
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for i = 1, #colors do
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local color = colors[i]
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local x = (i-1)/(#colors-1)
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table.insert(mesh_data, {x, 1, x, 1, color.r, color.g, color.b, color.a or 1})
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table.insert(mesh_data, {x, 0, x, 0, color.r, color.g, color.b, color.a or 1})
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end
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elseif direction == "vertical" then
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for i = 1, #colors do
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local color = colors[i]
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local y = (i-1)/(#colors-1)
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table.insert(mesh_data, {1, y, 1, y, color.r, color.g, color.b, color.a or 1})
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table.insert(mesh_data, {0, y, 0, y, color.r, color.g, color.b, color.a or 1})
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end
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end
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self.mesh = love.graphics.newMesh(mesh_data, "strip", "static")
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end
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-- Draws the gradient image with size w, h centered on x, y.
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function GradientImage:draw(x, y, w, h, r, sx, sy, ox, oy)
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graphics.push(x, y, r)
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love.graphics.draw(self.mesh, x - (sx or 1)*(w + (ox or 0))/2, y - (sy or 1)*(h + (oy or 0))/2, 0, w*(sx or 1), h*(sy or sx or 1))
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graphics.pop()
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end
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