Ok, this writz is working

.gitignore

@@ -91,4 +91,7 @@ experiment/movepixels
 experiment/tcache
 
 contrib/fimg2povhf
-
+contrib/*.tga
+contrib/pov.stderr
+contrib/*.png
+contrib/*.gif

contrib/Makefile

@@ -1,5 +1,5 @@
 
-DBGL = '-DDEBUG_LEVEL=1'
+DBGL = '-DDEBUG_LEVEL=1 -g '
 
 fimg2povhf:	fimg2povhf.c Makefile
 	gcc -Wall $(DBGL) $< -limage -lfloatimg -lm -o $@

contrib/README.md

@@ -1,4 +1,12 @@
 # Contributions
 
+## fimg2povhf
+
 Need some external garbage, sorry.
 
+Try to compile this really old code:
+   http://la.buvette.org/devel/libimage/libimage.html
+
+Use the code, frtk !
+
+

contrib/fimg2povhf.c

@@ -5,6 +5,7 @@
  */
 
 #include  <stdio.h>
+#include  <stdlib.h>
 #include  <math.h>
 
 #include  "tthimage.h"
@@ -15,17 +16,33 @@ int		verbosity;
 /* ------------------------------------------------------------------ */
 int This_is_the_real_conversion(FloatImg *fimg, Image_Desc *hf, int k)
 {
-FloatImg		mixed;
 int			foo;
 float			minmax[6];
-
+int			x, y, h;
+float			rgb[6], cumul;
+float			maxi;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %d  )\n", __func__, fimg, hf, k);
 #endif
 
 foo = fimg_get_minmax_rgb(fimg, minmax);
-fimg_print_minmax(minmax, "source");
+// fimg_print_minmax(minmax, "source");
+
+maxi = 0.0;
+
+for (y=0; y<fimg->height; y++) {
+	for (x=0; x<fimg->width; x++) {
+		foo = fimg_get_rgb(fimg, x, y, rgb);
+		/* non-magic nuabmer spotted */
+		cumul = 1.732 * (rgb[1] + rgb[3] + rgb[5]);
+		if (cumul > maxi) maxi = cumul;
+		h = (int)cumul;
+		foo = Image_hf15_plot(hf, x, y, h);
+		}
+	}
+
+fprintf(stderr, "--- the critical maximum is %f\n", maxi);
 
 return FULL_NUCKED;
 }
@@ -36,7 +53,6 @@ FloatImg		fimg;
 Image_Desc		*hf;
 int			wid, hei;
 int			foo;
-
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %s %s %d  )\n", __func__, fimgname, hfname, k);
 #endif
@@ -48,7 +64,7 @@ if (foo) {
 	}
 
 wid = fimg.width;  hei = fimg.height;		// nice alias
-fprintf(stderr, "picture size %dx%d\n", wid, hei);
+fprintf(stderr, "   source picture size %dx%d\n", wid, hei);
 
 hf = Image_alloc(wid, hei, IMAGE_RGB);
 fprintf(stderr, "hf alloc -> %p\n", hf);
@@ -59,9 +75,18 @@ if (NULL == hf) {
 foo = This_is_the_real_conversion(&fimg, hf, k);
 fprintf(stderr, "real conversion -> %d\n", foo);
 
+foo = Image_TGA_save(hfname, hf, 0);
+fprintf(stderr, "export as tga  -> %d\n", foo);
+
 return FULL_NUCKED;
 }
 /* ------------------------------------------------------------------ */
+void help(int nu)
+{
+printf("usage :\n");
+printf("\t$ fimg2povhf src.fimg dst.tga\n");
+}
+/* ------------------------------------------------------------------ */
 
 int main(int argc, char *argv[])
 {
@@ -69,13 +94,22 @@ int		foo;
 
 verbosity = 1;
 
+// printf("%s: argc = %d\n", argv[0], argc);
+
+if (3 != argc) {
+	help(0);
+	exit(0);
+	}
+
+if (verbosity > 1) {
 	Image_print_version(3);
 	fimg_print_version(3);
+	}
 
-
-foo = Convertir_Fimg_to_Povhf("foo.fimg", "out.tga", 0);
+foo = Convertir_Fimg_to_Povhf(argv[1], argv[2], 0);
 fprintf(stderr, "retour conversion was %d\n", foo);
 
+fprintf(stderr, "end\n\n");
 return 0;
 }
 

contrib/raytrace.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+src="/dev/shm/foo.fimg"
+dst="hf.tga"
+
+POVOPT="-w512 -h342 +q9 -a "
+
+rm /tmp/hf???.png
+
+for idx in $(seq 0 24)
+do
+
+	echo "========================== " $idx
+
+	grabvidseq -v				\
+		-d /dev/video0 -s 640x480	\
+		-n 20 -p 0			\
+		-o ${src} 
+
+	./fimg2povhf $src $dst
+
+	out=$(printf "/tmp/hf%03d.png" $idx)
+	echo "raytracing   " ${POVOPT} $out
+	povray -iscene.pov ${POVOPT}  -o${out} 2> pov.stderr
+	# tail -15 pov.stderr
+
+done
+
+convert -delay 10 -colors 240 /tmp/hf???.png foo.gif
+

contrib/scene.pov

@@ -0,0 +1,40 @@
+
+/*    scene demo conversion floatimg -> height field  */
+
+#version 3.7;
+
+global_settings {
+  ambient_light rgb <0.07, 0.07, 0.07>
+  assumed_gamma 1.0
+  }
+
+#include  "colors.inc"
+
+height_field {
+	tga "hf.tga"
+	smooth
+	pigment { color Orange*0.5  }
+	translate <-0.5, 0, -0.5>
+	scale 2
+	translate y*0.01
+	}
+
+camera	{
+	location	<-0.86, 3, -6.20>
+	look_at		<0, 0, 0>
+	angle		14
+	}
+
+plane {
+ <0, 1, 0>, 0
+ pigment {
+   hexagon 
+   pigment { color Gray20 },
+   pigment { color Gray10 },
+   pigment { color Gray30 }
+   }
+  scale 0.27
+ }
+
+
+light_source { <-9, 2, -3> color White }