32 lines
971 B
Plaintext
32 lines
971 B
Plaintext
survey_animation = function()
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---[[ '--' at start to disable animation, '---' to enable
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local minx, miny, maxx, maxy = surface_bounds(Definitions)
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-- ensure 1px of white background all around
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-- just in case the viewport ever goes
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-- outside canvas bounds while animating
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minx,miny, maxx,maxy = minx-1,miny-1, maxx+2,maxy+1
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local zoomx = App.screen.width/(maxx-minx)
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local zoomy = App.screen.height/(maxy-miny)
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local zoom, cw, ch
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if zoomx < zoomy then
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zoom = zoomx
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cw = maxx-minx
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ch = cw*App.screen.height/App.screen.width
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else
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zoom = zoomy
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ch = maxy-miny
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cw = ch*App.screen.width/App.screen.height
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end
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Global_viewport = {x=minx, y=miny, w=cw, h=ch, zoom=zoom}
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snapshot_canvas()
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-- initialize animation
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Animating = {
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copy_viewport(Global_viewport),
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copy_viewport(Viewport),
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}
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Viewport.x = -App.screen.width/2
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Viewport.y = -App.screen.height/2
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Viewport.w = App.screen.width
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Viewport.h = App.screen.height
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Viewport.zoom = 1.0 --]]
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end |