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63 lines
1.3 KiB
63 lines
1.3 KiB
3 years ago
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require "matrix"
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class PhysObj
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attr_accessor :world, :pos, :vel, :accel, :x, :y
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def initialize(world)
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@world = world
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@pos = Vector.zero(2)
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@vel = Vector.zero(2)
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@accel = Vector.zero(2)
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@x, @y = 0, 0
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end
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def tick
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if( @accel.magnitude != 0 ) then
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@vel += @accel
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end
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if( @vel.magnitude != 0 ) then
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@pos += @vel
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end
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@x, @y = @pos[0], @pos[1]
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end
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end
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class PhysCube < PhysObj
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attr_reader :width, :height
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def initialize(world, width, height, color=0xff_ffffff, ela=-0.8)
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super world
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@width, @height = width, height
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@color = Gosu::Color.argb(color)
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@ela = ela
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end
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def draw_vector(vec, scale=0.1, color=0xaf_ffaaaa)
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clr = Gosu::Color.argb(color)
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dx, dy = vec[0], vec[1]
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xx, yy = @x + @width/2, @y + @height/2
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Gosu.draw_line(xx, yy, clr, (xx + dx).round(1) * scale, (yy + dy).round(1) * scale, clr)
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puts("#{dx} #{dy} #{[xx - (xx + dx), yy - (yy + dy)]}")
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end
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def render
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x, y = self.pos[0], self.pos[1]
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Gosu.draw_quad(x, y, @color, x + self.width, y, @color, x, y + self.height, @color, x + self.width, y + self.height, @color)
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self.draw_vector(@accel, 10, 0xff_00ff00)
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end
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def physics
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self.tick
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x, y = self.pos[0], self.pos[1]
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x_max = world.width - self.width
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y_max = world.height - self.height
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if( x > x_max ) then self.pos[0] = x_max end
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if( y > y_max ) then self.pos[1] = y_max end
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end
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end
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