How To Fix Fisheye In Clear Coat
Hello I have a game using raycasting for the TI Nspire in Lua, and when the player faces a wall so that their degree they are facing is perpendicular to the length of the wall, I am having what is described as the fishbowl/fisheye effect.
How can I fix this? I have already looked here, and none of that makes sense to me. Here is my code:
map = {{0, 0, 50, 0},{50, 0, 50, 50},{50, 50, 0, 50},{0, 50, 0, 0}} facing = 45 --"player rotation" rays = {} x, y = 25, 25 function raycast() for i,v in pairs(rays) do rays[i] = nil end rayf = facing + 30 for i = 1, 320, 1 do --64, 5 x_ray, y_ray = x, y ray() table.insert(rays, radius) rayf = rayf - (60/320) end platform.window:invalidate() end function ray() radius = 1 for n = 1, 50, 1 do -- increase of testdot x_ray = math.floor(x + (radius * math.cos(rayf * 3.141592653/180))) y_ray = math.floor(y - (radius * math.sin(rayf * 3.141592653/180))) for k,v in pairs(map) do if ( math.min(v[1],v[3]) <= x_ray and x_ray <= math.max(v[1],v[3]) ) and ( math.min(v[2],v[4]) <= y_ray and y_ray <= math.max(v[2],v[4]) ) then --print("Collision") return true end end radius = n end end function on.paint(gc) gc:setColorRGB(0,200,255) gc:fillRect(0, 0, 320, 108) gc:setColorRGB(100,100,100) gc:fillRect(0, 109, 320, 109) gc:setColorRGB(100,0,100) for i,v in ipairs(rays) do gc:drawLine(i, 108.5 - ((100/v * 20)/2), i, 108.5 + ((100/v * 20)/2)) end end function on.arrowKey(key) if key == 'left' then facing = facing + 3 elseif key == 'right' then facing = facing - 3 end if key == 'up' then y = y - 1 elseif key == 'down' then y = y + 1 end raycast() end I have also tried it like this:
map = {{0, 0, 50, 0},{50, 0, 50, 50},{50, 50, 0, 50},{0, 50, 0, 0}} facing = 45 --"player rotation" rays = {} x, y = 25, 25 function raycast() for i,v in pairs(rays) do rays[i] = nil end rayf = facing + 30 for i = 1, 320, 1 do --64, 5 x_ray, y_ray = x, y ray() ---------------- fisheyeradius = radius / (math.cos(rayf - facing)) table.insert(rays, fisheyeradius) ---------------- rayf = rayf - (60/320) end platform.window:invalidate() end function ray() radius = 1 for n = 1, 50, 1 do -- increase of testdot x_ray = math.floor(x + (radius * math.cos(rayf * 3.141592653/180))) y_ray = math.floor(y - (radius * math.sin(rayf * 3.141592653/180))) for k,v in pairs(map) do if ( math.min(v[1],v[3]) <= x_ray and x_ray <= math.max(v[1],v[3]) ) and ( math.min(v[2],v[4]) <= y_ray and y_ray <= math.max(v[2],v[4]) ) then --print("Collision") return true end end radius = n end end function on.paint(gc) gc:setColorRGB(0,200,255) gc:fillRect(0, 0, 320, 106) gc:setColorRGB(100,100,100) gc:fillRect(0, 106, 320, 106) gc:setColorRGB(100,0,100) for i,v in ipairs(rays) do gc:drawLine(i, 108.5 - ((100/v * 20)/2), i, 108.5 + ((100/v * 20)/2)) end end function on.arrowKey(key) if key == 'left' then facing = facing + 3 elseif key == 'right' then facing = facing - 3 end if key == 'up' then y = y - 1 elseif key == 'down' then y = y + 1 end raycast() end The wall originally looked like this:
But I have made changes around the ---------------, and now the wall looks like this:
I this supposed to occur?
How To Fix Fisheye In Clear Coat
Source: https://gamedev.stackexchange.com/questions/156842/how-can-i-correct-an-unwanted-fisheye-effect-when-drawing-a-scene-with-raycastin
Posted by: harrisonwitinithey.blogspot.com
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