Write a .flo file for easier evaluation.

diff --git a/flow.cpp b/flow.cpp
index 7f714c274c0837c17b74de5ead62172b3c45349c..43daa787905c87584b9bbdc54cb31063733b05ac 100644 (file)
--- a/flow.cpp
+++ b/flow.cpp
@@ -527,7 +527,11 @@ int main(void)
        glGetTextureImage(prev_level_flow_tex, 0, GL_RGB, GL_FLOAT, level_width * level_height * 3 * sizeof(float), dense_flow.get());
 
        FILE *fp = fopen("flow.ppm", "wb");
+       FILE *flowfp = fopen("flow.flo", "wb");
        fprintf(fp, "P6\n%d %d\n255\n", level_width, level_height);
+       fprintf(flowfp, "FEIH");
+       fwrite(&level_width, 4, 1, flowfp);
+       fwrite(&level_height, 4, 1, flowfp);
        for (unsigned y = 0; y < unsigned(level_height); ++y) {
                int yy = level_height - y - 1;
                for (unsigned x = 0; x < unsigned(level_width); ++x) {
@@ -538,6 +542,9 @@ int main(void)
                        du = (du / w) * level_width;
                        dv = (-dv / w) * level_height;
 
+                       fwrite(&du, 4, 1, flowfp);
+                       fwrite(&dv, 4, 1, flowfp);
+
                        uint8_t r, g, b;
                        flow2rgb(du, dv, &r, &g, &b);
                        putc(r, fp);
@@ -546,6 +553,7 @@ int main(void)
                }
        }
        fclose(fp);
+       fclose(flowfp);
 
        fprintf(stderr, "err = %d\n", glGetError());
 }