Added bounds checking for triangles.

src/include/geom.h

@@ -1,6 +1,10 @@
 #ifndef GEOM_H
 #define GEOM_H
 
+#include <stdlib.h>
+#include <stdbool.h>
+#include <raylib.h>
+
 // The maximum number of Tris in a Plate.
 #define NTRI 4
 
@@ -19,8 +23,19 @@ typedef struct {
     Pt c;
 } Tri;
 
+extern Tri* alltris[512];
+extern size_t allsize;
+
+Tri* tri_init(Pt a, Pt b, Pt c);
+void tri_destroy(Tri* tri);
+
+// Check if a point is within the triangle. Uses barycentric coordinate system.
+bool tri_within(Pt pt, Tri* tri);
+
 typedef struct {
-    Tri tris[NTRI];
+    Color col;
+    size_t ntris;
+    Tri* tris;
 } Plate;
 
 #endif