ooops seems i forgot to add this /o\

samples/mathtest.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define XRES 30
+
+float x1, x2, x3;
+float y1, y2, y3;
+int j, i;
+int xpos1, xpos2, xpos3;
+
+#define STEP1   ((M_PI*2) / 15.0f)
+#define STEP2   ((M_PI*2) / 17.0f)
+//#define STEP3   0.0001f
+#define STEP3   0.025f
+
+char buf[100];
+
+unsigned char pix;
+              //01234567
+char *colors = ".oO#%*=-";
+
+int main(void)
+{
+    y1 = 0;
+    y2 = 0;
+    y3 = 0;
+
+    while (1) {
+
+        y1 = y1 + STEP1;
+        y2 = y2 + STEP2;
+        y3 = y3 + STEP3;
+
+        x1 = (sinf(y1) * (XRES / 2.0f)) + (XRES / 2.0f);
+        x2 = (cosf(y2) * (XRES / 2.0f)) + (XRES / 2.0f);
+        x3 = tanf(y3) + (XRES / 2.0f);
+
+        xpos1 = x1;
+        xpos2 = x2;
+        xpos3 = x3;
+//        printf("%s\n", _ftostr(buf, xpos2)); continue;
+//        printf("%s\n", _ftostr(buf, xpos3)); continue;
+
+        for (i = 0; i < XRES; i++) {
+            pix = 0;
+            if (i >= xpos1) {
+                pix |= 1;
+            }
+            if (i <= xpos2) {
+                pix |= 2;
+            }
+            if ((i == xpos3) || (i == xpos3 - 1) || (i == xpos3 + 1)) {
+                pix |= 4;
+            }
+            putchar(colors[pix]);
+        }
+        putchar('\n');
+    }
+}