setup examples and clean codebase

example/n-cube.c

@@ -0,0 +1,50 @@
+#include <math.h>
+#include <stdio.h>
+
+#define KLEIN_IMPLEMENT
+#include <klein/klein.h>
+#include <klein/norm.h>
+#include <klein/parm.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+unsigned char dim = 4;
+
+void cube(float *d_surface, int *coord, unsigned char *grid)
+{
+	int i;
+
+	for (i = 0; i < dim; i++)
+		d_surface[i] = (2 * (float)coord[i] / grid[i]) - 1;
+
+	if (dim == 2)
+		d_surface[2] = 0;
+}
+
+int main(void)
+{
+	unsigned char i;
+	char file_name[0xff];
+	struct klein klein;
+	struct parm parametrization = {
+		.m = dim,
+		.n = dim,
+		.f = cube,
+	};
+
+	parametrization.grid = malloc(dim);
+
+	for (i = 0; i < dim; ++i)
+		parametrization.grid[i] = 1 << i;
+
+	snprintf(file_name, 0xff, "%03d-cube.klein", dim);
+	printf("writing %s\n", file_name);
+
+	klein_parametrize(&klein, parametrization);
+	klein_normalize(&klein);
+	klein_export_file(klein, file_name);
+
+	return 0;
+}