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Animations!

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This commit is contained in:
Carlos Sanchez 2024-07-24 19:18:42 -04:00
parent d3e27026ef
commit 0d12bc4156
2 changed files with 35 additions and 6 deletions
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24
tinyrender1_perspective/animation.sh Executable file
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@ -0,0 +1,24 @@
#!/bin/sh
if [ $# -ne 1 ]; then
echo "You must pass the basename for the animation folder"
exit 1
fi
echo "Building"
go build
mkdir -p $1
echo "Running"
frame=0
for x in $(seq -3 0.1 3); do
ff=$(printf "%03d" $frame)
./tinyrender1 "-xofs=$x" "-zofs=-1.8" "-fov=70" >"$1/$ff.ppm"
frame=$((frame + 1))
done
echo "Converting animation"
cd $1
convert -delay 5 -loop 0 *.ppm -resize 256x256 anim.gif

17
tinyrender1_perspective/main.go
View File

@ -11,11 +11,11 @@ import (
const (
Width = 512
Height = 512
FOV = 110
FOV = 70
NearClip = 0.1
FarClip = 2 // Because the head is so small and close
FarClip = 5 // Because the head is so small and close
ObjectFile = "head.obj"
Repeat = 1000
Repeat = 1 // Because I want to see an animation
)
func must(err error) {
@ -26,6 +26,9 @@ func must(err error) {
// However flag works... idk
var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
var xofs = flag.Float64("xofs", 0, "Offset image by x")
var zofs = flag.Float64("zofs", -1.5, "Offset image by z (should be negative)")
var fov = flag.Float64("fov", 90, "Field of view")
func main() {
log.Printf("Program start")
@ -59,9 +62,10 @@ func main() {
var projection Mat44f
var worldToCamera Mat44f
projection.SetProjection(FOV, NearClip, FarClip)
projection.SetProjection(float32(*fov), NearClip, FarClip)
worldToCamera.SetIdentity()
worldToCamera.Set(2, 3, -1) // Get farther away from the face
worldToCamera.Set(0, 3, float32(*xofs)) // Let user decide how to offset x
worldToCamera.Set(2, 3, float32(*zofs)) // Get farther away from the face (user)
var x [3]int
var y [3]int
@ -78,7 +82,8 @@ func main() {
fp = projection.MultiplyPoint3(fp)
x[i] = int((fp.X + 1) * halfwidth)
y[i] = hi - int((fp.Y+1)*halfheight)
c[i] = Col2Uint(byte(0xFF*fp.Z), byte(0xFF*fp.Z), byte(0xFF*fp.Z))
c[i] = 0xFFFFFF
//c[i] = Col2Uint(byte(0xFF*fp.Z), byte(0xFF*fp.Z), byte(0xFF*fp.Z))
}
Bresenham2(&fb, c[0], x[0], y[0], x[1], y[1])
Bresenham2(&fb, c[1], x[1], y[1], x[2], y[2])