mirror of
https://gitlab.com/gaelysam/mapgen_rivers.git
synced 2025-02-20 14:00:32 +01:00
Added time statistics and removed debug prints
This commit is contained in:
Gaël C
parent
5898354dbe
commit
ecd1f0e08f
21
init.lua
21
init.lua
@ -38,7 +38,13 @@ local noise_heat_blend_map = {}
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local mapsize
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local init = false
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local sumtime = 0
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local sumtime2 = 0
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local ngen = 0
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local function generate(minp, maxp, seed)
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print(("[mapgen_rivers] Generating from %s to %s"):format(minetest.pos_to_string(minp), minetest.pos_to_string(maxp)))
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local chulens = {
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x = maxp.x-minp.x+1,
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y = maxp.y-minp.y+1,
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@ -63,6 +69,7 @@ local function generate(minp, maxp, seed)
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init = true
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end
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local t0 = os.clock()
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local minp2d = {x=minp.x, y=minp.z}
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if use_distort then
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noise_x_obj:get_3d_map_flat(minp, noise_x_map)
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@ -130,7 +137,7 @@ local function generate(minp, maxp, seed)
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local incrZ = mapsize.x*mapsize.y - mapsize.x*incrX - mapsize.x*mapsize.y*incrY
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local i2d = 1
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for z = minp.z, maxp.z do
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for x = minp.x, maxp.x do
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local ivm = a:index(x, minp.y, z)
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@ -221,6 +228,18 @@ local function generate(minp, maxp, seed)
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vm:calc_lighting()
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vm:update_liquids()
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vm:write_to_map()
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local t1 = os.clock()
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local t = t1-t0
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ngen = ngen + 1
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sumtime = sumtime + t
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sumtime2 = sumtime2 + t*t
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print(("[mapgen_rivers] Done in %5.3f s"):format(t))
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end
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minetest.register_on_generated(generate)
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minetest.register_on_shutdown(function()
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local avg = sumtime / ngen
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local std = math.sqrt(sumtime2/ngen - avg*avg)
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print(("[mapgen_rivers] Mapgen statistics:\n- Mapgen calls: %4d\n- Mean time: %5.3f s\n- Standard deviation: %5.3f s"):format(avg, std))
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end)
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@ -88,8 +88,6 @@ local init = false
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-- On map generation, determine into which polygon every point (in 2D) will fall.
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-- Also store polygon-specific data
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local function make_polygons(minp, maxp)
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print("Generating polygon map")
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print(minp.x, maxp.x, minp.z, maxp.z)
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local grid = mapgen_rivers.grid
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local dem = grid.dem
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@ -113,7 +111,6 @@ local function make_polygons(minp, maxp)
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-- Determine the minimum and maximum coordinates of the polygons that could be on the chunk, knowing that they have an average size of 'blocksize' and a maximal offset of 0.5 blocksize.
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local xpmin, xpmax = math.max(math.floor((minp.x+map_offset.x)/blocksize - 0.5), 0), math.min(math.ceil((maxp.x+map_offset.x)/blocksize + 0.5), X-2)
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local zpmin, zpmax = math.max(math.floor((minp.z+map_offset.z)/blocksize - 0.5), 0), math.min(math.ceil((maxp.z+map_offset.z)/blocksize + 0.5), Z-2)
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print(xpmin, xpmax, zpmin, zpmax)
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-- Iterate over the polygons
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for xp = xpmin, xpmax do
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@ -135,9 +132,6 @@ local function make_polygons(minp, maxp)
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(offset_z[iC]+zp+1) * blocksize - map_offset.z,
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(offset_z[iD]+zp+1) * blocksize - map_offset.z,
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}
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if xp==xpmin and zp==zpmin then
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print(xp, zp, poly_x[1], poly_z[1])
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end
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local polygon = {x=poly_x, z=poly_z, i={iA, iB, iC, iD}}
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local bounds = {} -- Will be a list of the intercepts of polygon edges for every Z position (scanline algorithm)
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@ -2,27 +2,18 @@
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local function get_box_size(sigma, n)
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local v = sigma^2 / n
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--print('v: '..v)
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local r_ideal = ((12*v + 1) ^ 0.5 - 1) / 2
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--print('r_ideal: '..r_ideal)
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local r_down = math.floor(r_ideal)
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--print('r_down: '..r_down)
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local r_up = math.ceil(r_ideal)
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--print('r_up: '..r_up)
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local v_down = ((2*r_down+1)^2 - 1) / 12
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--print('v_down: '..v_down)
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local v_up = ((2*r_up+1)^2 - 1) / 12
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--print('v_up: '..v_up)
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local m_ideal = (v - v_down) / (v_up - v_down) * n
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--print('m_ideal: '..m_ideal)
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local m = math.floor(m_ideal+0.5)
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--print('m: '..m)
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local sizes = {}
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for i=1, n do
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sizes[i] = i<=m and 2*r_up+1 or 2*r_down+1
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end
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--print('sizes: '..table.concat(sizes, ', '))
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return sizes
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end
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@ -44,7 +44,6 @@ local function flow_routing(dem, dirs, lakes, method)
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dirs.Y = Y
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lakes.X = X
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lakes.Y = Y
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--print(X, Y)
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local i = 1
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local dirs2 = {}
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for i=1, X*Y do
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@ -81,7 +80,6 @@ local function flow_routing(dem, dirs, lakes, method)
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-- Compute basins and links
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local nbasins = #singular
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print(nbasins)
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local basin_id = {}
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local links = {}
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local basin_links
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@ -196,7 +194,6 @@ local function flow_routing(dem, dirs, lakes, method)
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local basin_graph = {}
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for n=1, nbasins do
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--print(n, nbasins)
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local b1, lnk1 = next(lowlevel)
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lowlevel[b1] = nil
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@ -204,16 +201,13 @@ local function flow_routing(dem, dirs, lakes, method)
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local lowest = math.huge
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local lnk1 = links[b1]
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local i = 0
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--print('Scanning basin '..b1)
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for bn, bdata in pairs(lnk1) do
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--print('- Link '..bn)
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i = i + 1
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if bdata.elev < lowest then
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lowest = bdata.elev
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b2 = bn
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end
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end
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--print('Number of links: '..i..' vs '..nlinks[b1])
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-- Add link to the graph
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local bound = lnk1[b2]
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@ -226,49 +220,34 @@ local function flow_routing(dem, dirs, lakes, method)
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end
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basin_graph[bb1][bb2] = bound
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basin_graph[bb2][bb1] = bound
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--if bb1 == 0 then
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-- print(bb2)
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--elseif bb2 == 0 then
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-- print(bb1)
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--end
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-- Merge basin b1 into b2
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--print("Merging "..b1.." into "..b2)
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local lnk2 = links[b2]
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-- First, remove the link between b1 and b2
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lnk1[b2] = nil
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lnk2[b1] = nil
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nlinks[b2] = nlinks[b2] - 1
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--print('Decreasing link count of '..b2..' ('..nlinks[b2]..')')
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if nlinks[b2] == 8 then
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--print('Added to lowlevel')
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lowlevel[b2] = lnk2
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end
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--print('Scanning neighbourg of '..b1..' to fix links')
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-- Look for basin 1's neighbours, and add them to basin 2 if they have a lower pass
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for bn, bdata in pairs(lnk1) do
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--print('- Neighbour '..bn)
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local lnkn = links[bn]
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lnkn[b1] = nil
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if lnkn[b2] then
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nlinks[bn] = nlinks[bn] - 1
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--print('Decreasing link count of '..bn..' ('..nlinks[bn]..')')
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if nlinks[bn] == 8 then
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--print('Added to lowlevel')
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lowlevel[bn] = lnkn
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end
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else
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nlinks[b2] = nlinks[b2] + 1
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--print('Increasing link count of '..b2..' ('..nlinks[b2]..')')
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if nlinks[b2] == 9 then
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--print('Removed from lowlevel')
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lowlevel[b2] = nil
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end
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end
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if not lnkn[b2] or lnkn[b2].elev > bdata.elev then
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--print(' - Redirecting link')
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lnkn[b2] = bdata
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lnk2[bn] = bdata
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end
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@ -282,17 +261,13 @@ local function flow_routing(dem, dirs, lakes, method)
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end
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local reverse = {3, 4, 1, 2, [0]=0}
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for n=1, nbasins do
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--print(n, nbasins)
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local b1, elev1 = next(queue)
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queue[b1] = nil
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basin_lake[b1] = elev1
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--print('Scanning basin '..b1)
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for b2, bound in pairs(basin_graph[b1]) do
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--print('Flow '..b2..' into '..b1)
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-- Make b2 flow into b1
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local i = bound.i
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local dir = bound.is_y and 3 or 4
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--print(basin_id[i])
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if basin_id[i] ~= b2 then
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dir = dir - 2
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if bound.is_y then
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@ -303,8 +278,7 @@ local function flow_routing(dem, dirs, lakes, method)
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elseif b1 == 0 then
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dir = 0
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end
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--print(basin_id[i])
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--print('Reversing directions')
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repeat
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dir, dirs[i] = dirs[i], dir
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if dir == 1 then
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@ -363,12 +337,10 @@ local function accumulate(dirs, waterq)
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end
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for i1=1, X*Y do
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--print(i1, ndonors[i1])
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if ndonors[i1] == 0 then
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local i2 = i1
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local dir = dirs[i2]
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local w = waterq[i2]
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--print(dir)
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while dir > 0 do
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if dir == 1 then
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i2 = i2 + X
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@ -379,7 +351,6 @@ local function accumulate(dirs, waterq)
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elseif dir == 4 then
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i2 = i2 - 1
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end
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--print('Incrementing '..i2)
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w = w + waterq[i2]
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waterq[i2] = w
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