-- This program automates the process of creating simple fly-by animations.
-- The rasters are saved in the `frames' directory, and if ffmpeg is
-- installed, the frames will also be combined into a video file. This script
--- must be called from the same directory where the rasterize program is.
+-- must be called from the same directory where the raytrace program is.
-- Set the number of frames to be rendered for the animation.
local frames = 360
-- Define the code to calculate where the camera is, in world coordinates.
local eye = function(frame)
-- just rotate around the center of the scene on the XZ plane
- local center = vec_new(0, 1, 0)
+ local center = vec_new(0, -0.5, 0)
local distance = 4
local start = math.pi
local t = start + 2 * math.pi * frame / frames
-- Define the code to calculate where the focal point of the scene is.
local look = function(frame)
- -- keep the camera focused on the buddha
- return vec_new(2, 1, 2)
+ -- keep the camera focused at the center
+ return vec_new(0, 0, 0)
end
-- Define the actual objects of the scene that will be rendered, in the
--- extended u3d format.
+-- extended urt format.
local scene = [[
-L 0 1000000 0 1 1 1 1 1 1
-L 0 0 1000000 1 1 1 1 1 1
-g ak47.obj
-c 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
-M 0.9 0.9 0.9 128
-g dragon.raw
-M 0.3 0.3 0.3 5
-c 0.7 0.3 0.2 0.8 0.2 0.1 0.9 0.2 0.2
-t -2 -1 -2
-s 2 2 2
-g budda.raw
-c 0.1 0.2 0.7 0.1 0.3 0.9 0.2 0.1 0.8
-t 2 -1.5 2
-s 10 10 10
-g bunny.raw
-M 0.2 0.2 0.2 1
-c 0.9 0.8 0.9 0.8 0.7 0.9 0.9 0.8 0.7
-t -2 -1 2
-s 10 10 10
+l 0.0 10.0 1.0 0.8 0.7 0.8
+p 0.0 -5.0 0.0 0.0 1.0 0.0 0.4 0.8 0.4
+s 0.0 0.0 0.0 1.25 1.0 0.0 0.0
+s -1.0 -1.0 0.0 1.0 0.0 1.0 0.0
+s 1.0 -1.0 0.0 1.0 0.0 0.0 1.0
+t -1.5 0.0 1.5 -1.0 1.0 0.0 -0.5 0.0 1.5 0.8 0.9 0.2
+t 1.5 0.0 1.5 1.0 1.0 0.0 0.5 0.0 1.5 0.2 0.9 0.8
]]
--- Set the number of samples for supersampling. If this is set to a value of
--- two or greater, each frame will be rendered larger by the factor specified.
--- ImageMagick is used to scale the frames back down to size; if ImageMagick
--- is not installed, the resulting frames will end up bigger than they should
--- be and the aliasing problem will not be fixed.
+-- Set the number of samples for supersampling. If this is set to a value
+-- of two or greater, each frame will be rendered larger by the factor
+-- specified. ImageMagick is used to scale the frames back down to size;
+-- if ImageMagick is not installed, this script will exit with error 1.
local supersample = 2
-- Set the width and height of the viewport.
-local size = {w = 640, h = 480}
+local size = {w = 800, h = 600}
-- Set the number of concurrent renderings (for multi-core machines).
local jobs = 6
h = h * supersample
end
local filename = fmt("frames/anim%04d.bmp", i)
- local command = fmt("./rasterize -o %s >/dev/null", filename)
+ local command = fmt("./raytrace -o %s >/dev/null", filename)
local out = io.popen(command, "w")
local e = eye(i)
local l = look(i)
write("\27[80D\27[2Kframe\t %4d / %d", i, frames)
out:write(fmt([[
-U3
+U5
%d %d
%f %f %f
%f %f %f
0 1 0
-1.57 %f 0.1 1000
+1.57 %f
+0.4 0.4 0.4
%s
X
]], w, h, e.x, e.y, e.z, l.x, l.y, l.z, size.w/size.h, scene))
i = coroutine.yield()
out:close()
- if 1 < supersample then
- run("convert %s -scale %dx%d %s", filename, size.w, size.h, filename)
+ if 1 < supersample and
+ run("convert %s -scale %dx%d %s", filename, size.w, size.h, filename) ~= 0 then
+ print()
+ os.exit(1)
end
end
end
if run("ffmpeg -i frames/anim%%04d.bmp %s -y -an scene.avi", ffmpeg_opts) == 0 then
print("Animation written to scene.avi.")
+else
+ print("The animation could not be created. Is ffmpeg installed?")
+ os.exit(2)
end
projects / chaz / rasterize / blobdiff