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Add "drawline" command to GPU
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parent
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16
docs/gpu.txt
16
docs/gpu.txt
@ -23,7 +23,7 @@ Parameters:
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buffer [integer 0-7]: The slot number to create the new buffer in. If the slot is already occupied, the existing contents will be erased.
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buffer [integer 0-7]: The slot number to create the new buffer in. If the slot is already occupied, the existing contents will be erased.
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xsize [integer 1-64]: The width of the new buffer in pixels.
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xsize [integer 1-64]: The width of the new buffer in pixels.
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ysize [integer 1-64]: The height of the new buffer in pixels.
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ysize [integer 1-64]: The height of the new buffer in pixels.
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color [hex color, default "000000"]: A color to fill the new buffer with.
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fill [hex color, default "000000"]: A color to fill the new buffer with.
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Command: send
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Command: send
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-------------
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-------------
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@ -133,3 +133,17 @@ x [integer 1-64]: The X position of the left side of the text.
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y [integer 1-64]: The Y position of the right side of the text.
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y [integer 1-64]: The Y position of the right side of the text.
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color [hex color, default "ff6600"]: The color of the text.
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color [hex color, default "ff6600"]: The color of the text.
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text: The text string to draw.
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text: The text string to draw.
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Command: drawline
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-----------------
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Draws a line on a buffer.
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Parameters:
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buffer [integer 0-7]: The buffer to draw the line on.
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x1 [integer 1-64]: The X position of the start of the line.
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x2 [integer 1-64]: The X position of the end of the line.
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y1 [integer 1-64]: The Y position of the start of the line.
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y2 [integer 1-64]: The Y position of the end of the line.
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color [hex color, default "000000"]: The nominal color of the line (may not be the color of every pixel, see the "antialias" setting)
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antialias [boolean, default false]: Whether to apply a (very) crude smoothing algorithm to the line to reduce jagged edges at the expense of making the line slightly blurry.
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35
gpu.lua
35
gpu.lua
@ -268,6 +268,41 @@ local function runcommand(pos,meta,command)
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end
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end
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end
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end
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meta:set_string("buffer"..bufnum,minetest.serialize(buffer))
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meta:set_string("buffer"..bufnum,minetest.serialize(buffer))
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elseif command.command == "drawline" then
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if type(command.buffer) ~= "number" or type(command.x1) ~= "number" or type(command.y1) ~= "number" or type(command.x2) ~= "number" or type(command.y2) ~= "number" then return end
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local bufnum = math.floor(command.buffer)
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if bufnum < 0 or bufnum > 7 then return end
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local x1 = math.min(64,math.floor(command.x1))
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local y1 = math.min(64,math.floor(command.y1))
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local x2 = math.min(64,math.floor(command.x2))
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local y2 = math.min(64,math.floor(command.y2))
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if x1 < 1 or y1 < 1 or x2 < 1 or y2 < 1 then return end
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local buffer = meta:get_string("buffer"..bufnum)
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if string.len(buffer) == 0 then return end
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buffer = minetest.deserialize(buffer)
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if type(buffer) ~= "table" then return end
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x2 = math.min(x2,buffer.xsize)
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y2 = math.min(y2,buffer.ysize)
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local color = command.color
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if type(color) ~= "string" or string.len(color) > 7 or string.len(color) < 6 then color = "000000" end
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if string.sub(color,1,1) == "#" then color = string.sub(color,2,7) end
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if not tonumber(color,16) then color = "000000" end
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local p1 = vector.new(x1,y1,0)
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local p2 = vector.new(x2,y2,0)
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local length = vector.distance(p1,p2)
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local dir = vector.direction(p1,p2)
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if length > 0 then
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for i=0,length,0.3 do
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local point = vector.add(p1,vector.multiply(dir,i))
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point = vector.floor(point)
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if command.antialias then
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buffer[point.y][point.x] = blend(buffer[point.y][point.x],color,"average")
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else
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buffer[point.y][point.x] = color
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end
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end
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end
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meta:set_string("buffer"..bufnum,minetest.serialize(buffer))
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elseif command.command == "drawpoint" then
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elseif command.command == "drawpoint" then
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if type(command.buffer) ~= "number" or type(command.x) ~= "number" or type(command.y) ~= "number" then return end
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if type(command.buffer) ~= "number" or type(command.x) ~= "number" or type(command.y) ~= "number" then return end
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local bufnum = math.floor(command.buffer)
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local bufnum = math.floor(command.buffer)
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