lua-test-202107100001
This commit is contained in:
Juhani Krekelä
parent
4c376f42d8
commit
90f2879e9a
1 changed files with 65 additions and 75 deletions
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@ -1,26 +1,19 @@
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local fov = 90 * math.pi / 180
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local playerx = 10
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local playery = 10
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local angle = 0
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local angle = 1
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local playerspeed = 0
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local playerswspeed = 0
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local playermaxspeed = 100
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function love.load()
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love.mouse.setRelativeMode(true)
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end
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function love.mousemoved(x, y, dx, dy)
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angle = angle - dx / love.graphics.getWidth() * 2 * math.pi
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end
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local sin = {0, 0.707, 1, 0.707, 0, -0.707, -1, -0.707}
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local cos = {1, 0.707, 0, -0.707, -1, -0.707, 0, 0.707}
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function love.update(dt)
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playerx = playerx + math.sin(angle) * playerspeed * dt
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playerx = playerx + math.cos(angle) * playerswspeed * dt
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playery = playery + math.cos(angle) * playerspeed * dt
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playery = playery - math.sin(angle) * playerswspeed * dt
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playerx = playerx + sin[angle] * playerspeed * dt
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playerx = playerx + cos[angle] * playerswspeed * dt
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playery = playery + cos[angle] * playerspeed * dt
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playery = playery - sin[angle] * playerswspeed * dt
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end
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function love.keypressed(key)
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@ -32,11 +25,13 @@ function love.keypressed(key)
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playerswspeed = playerswspeed + playermaxspeed
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elseif key == 'd' then
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playerswspeed = playerswspeed - playermaxspeed
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elseif key == 'o' then
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fov = fov + 10 * math.pi / 180
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elseif key == 'p' then
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fov = fov - 10 * math.pi / 180
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elseif key == 'q' then
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angle = angle + 1
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if angle > 8 then angle = 1 end
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elseif key == 'e' then
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angle = angle - 1
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if angle < 1 then angle = 8 end
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elseif key == 'escape' then
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love.event.quit()
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end
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end
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@ -59,13 +54,13 @@ function transform(wx, wy)
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local ty = wy - playery
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-- Player-relative space (rotation)
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local rx = math.cos(angle) * tx - math.sin(angle) * ty
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local ry = math.cos(angle) * ty + math.sin(angle) * tx
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local rx = cos[angle] * tx - sin[angle] * ty
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local ry = cos[angle] * ty + sin[angle] * tx
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-- -1.0 to +1.0 abstract screen space (perspective)
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-- Player-relative x maps to *-x*
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-- Player-relative y maps to *z*
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local px = -rx / ry / math.tan(fov / 2)
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local px = -rx / ry
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-- Screen space (scaling and translation)
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local hwidth = love.graphics.getWidth() / 2
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@ -82,88 +77,83 @@ function drawWall(wx1, wy1, wx2, wy2)
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local x2, z2 = transform(wx2, wy2)
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if z1 < 0 and z2 < 0 then
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love.graphics.setColor(0.8, 0.7, 0.7)
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love.graphics.line(wx1 + hwidth, wy1 + hheight, wx2 + hwidth, wy2 + hheight)
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-- Fully outside of viewport, don't bother
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return
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end
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love.graphics.setColor(1, 0, 0)
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love.graphics.line(wx1 + hwidth, wy1 + hheight, wx2 + hwidth, wy2 + hheight)
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if z1 < 0 or z2 < 0 then
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local clippingx = playerx + 0.001*math.sin(angle)
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local clippingy = playery + 0.001*math.cos(angle)
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local clippingx = playerx + 0.001*sin[angle]
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local clippingy = playery + 0.001*cos[angle]
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local x = nil
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local y = nil
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if wx2 ~= wx1 then
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local clippingslope = -math.sin(angle)/math.cos(angle)
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local wallslope = (wy2 - wy1)/(wx2 - wx1)
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x = (-clippingslope*clippingx + clippingy + wallslope*wx1 - wy1)/(wallslope - clippingslope)
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y = wallslope*(x - wx1) + wy1
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else
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local perclippingslope = -math.cos(angle)/math.sin(angle)
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local perwallslope = (wx2 - wx1)/(wy2 - wy1)
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y = (-perclippingslope*clippingy + clippingx + perwallslope*wy1 - wx1)/(perwallslope - perclippingslope)
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x = perwallslope*(y - wy1) + wx1
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if angle == 1 or angle == 5 then
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y = clippingy
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if wx1 == wx2 then x = wx1
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elseif (wx1 < wx2) == (wy1 < wy2) then x = wx1 - wy1 + y
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else x = wx1 + wy1 - y
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end
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elseif angle == 3 or angle == 7 then
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x = clippingx
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if wy1 == wy2 then y = wy1
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elseif (wx1 < wx2) == (wy1 < wy2) then y = wy1 - wx1 + x
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else y = wy1 + wx1 - x
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end
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elseif angle == 2 or angle == 6 then
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if wy1 == wy2 then
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x = clippingx + clippingy - wy1
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y = wy1
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elseif wx1 == wx2 then
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x = wx1
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y = clippingx + clippingy - wx1
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else
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x = (wx1 + clippingx + clippingy - wy1) / 2
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y = (wy1 + clippingy + clippingx - wx1) / 2
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end
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elseif angle == 4 or angle == 8 then
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if wy1 == wy2 then
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x = clippingx - clippingy + wy1
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y = wy1
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elseif wx1 == wx2 then
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x = wx1
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y = clippingy - clippingx + wx1
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else
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x = (wx1 + clippingx - clippingy + wy1) / 2
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y = (wy1 + clippingy - clippingx + wx1) / 2
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end
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end
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if z1 < 0 then
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x1, z1 = transform(x, y)
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love.graphics.setColor(0.8, 0.5, 0.5)
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love.graphics.line(wx1 + hwidth, wy1 + hheight, x + hwidth, y + hheight)
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else
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x2, z2 = transform(x, y)
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love.graphics.setColor(0.8, 0.5, 0.5)
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love.graphics.line(x + hwidth, y + hheight, wx2 + hwidth, wy2 + hheight)
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if z1 < 0 then x1, z1 = transform(x, y)
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else x2, z2 = transform(x, y)
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end
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end
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local wall1 = hwidth * 60 / z1 / math.tan(fov / 2)
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local wall2 = hwidth * 60 / z2 / math.tan(fov / 2)
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local wall1 = hwidth * 60 / z1
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local wall2 = hwidth * 60 / z2
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love.graphics.setColor(1, 1, 1)
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love.graphics.line(x1, hheight - wall1, x2, hheight - wall2)
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love.graphics.line(x1, hheight + wall1, x2, hheight + wall2)
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love.graphics.line(x1, hheight - wall1, x1, hheight + wall1)
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love.graphics.line(x2, hheight - wall2, x2, hheight + wall2)
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if z1 < 0 then
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love.graphics.setColor(0, 0, 1)
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square = {
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wx1 - 5 + hwidth, wy1 - 5 + hheight,
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wx1 + 5 + hwidth, wy1 - 5 + hheight,
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wx1 + 5 + hwidth, wy1 + 5 + hheight,
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wx1 - 5 + hwidth, wy1 + 5 + hheight,
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}
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love.graphics.polygon('fill', square)
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love.graphics.line(hwidth+playerx, hheight+playery, hwidth+wx1, hheight+wy1)
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end
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if z2 < 0 then
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love.graphics.setColor(0, 0, 1)
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square = {
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wx2 - 5 + hwidth, wy2 - 5 + hheight,
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wx2 + 5 + hwidth, wy2 - 5 + hheight,
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wx2 + 5 + hwidth, wy2 + 5 + hheight,
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wx2 - 5 + hwidth, wy2 + 5 + hheight,
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}
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love.graphics.polygon('fill', square)
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love.graphics.line(hwidth+playerx, hheight+playery, hwidth+wx2, hheight+wy2)
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end
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end
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function love.draw()
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local hwidth = love.graphics.getWidth() / 2
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local hheight = love.graphics.getHeight() / 2
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drawWall(-300, -200, -200, 100)
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drawWall(-300, -200, -100, 0)
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drawWall(-100, 0, -300, 200)
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drawWall(-150, 200, 300, 200)
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drawWall(300, 200, 300, -200)
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drawWall(300, -200, -300, -200)
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love.graphics.setColor(0, 1, 0)
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love.graphics.line(hwidth+playerx, hheight+playery, hwidth+playerx + math.sin(angle + fov/2) * 5, hheight+playery + math.cos(angle + fov/2) * 5)
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love.graphics.line(hwidth+playerx, hheight+playery, hwidth+playerx + math.sin(angle - fov/2) * 5, hheight+playery + math.cos(angle - fov/2) * 5)
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love.graphics.setColor(1, 1, 1)
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anglecw = angle - 1
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if anglecw < 1 then anglecw = 8 end
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anglecc = angle + 1
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if anglecc > 8 then anglecc = 1 end
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love.graphics.line(hwidth, hheight, hwidth + sin[anglecw] * 5, hheight + cos[anglecw] * 5)
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love.graphics.line(hwidth, hheight, hwidth + sin[anglecc] * 5, hheight + cos[anglecc] * 5)
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end
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