New geometry data structures.

src/gen.c

@@ -1,5 +1,4 @@
 #include "include/gen.h"
-#include "include/col.h"
 
 #include <stdlib.h>
 #include <time.h>
@@ -107,25 +106,17 @@ Pt world_edge_idx_to_pt(int idx) {
 void gen_lith() {
     srand(time(NULL));
 
-    Pt p1 = {(rand() % 6) + 1, 0};
-    Pt p2 = {(rand() % 6) + 1, 7};
-
-    lith[0] = (Plate){
-        .col = COL_RED,
-        .nverts = 4,
-        .verts = {
-            (Pt){0, 0},
-            p1,
-            p2,
-            (Pt){0, 7},
-        },
+    Tri tri1 = {
+        (Pt){0, 0},
+        (Pt){0, 7},
+        (Pt){7, 0},
     };
-    lith[1] = (Plate){.col = COL_RED,
-                      .nverts = 4,
-                      .verts = {
-                          p1,
-                          (Pt){7, 0},
-                          (Pt){7, 7},
-                          p2,
-                      }};
+    Tri tri2 = {
+        (Pt){7, 0},
+        (Pt){0, 7},
+        (Pt){7, 7},
+    };
+
+    lith[0] = (Plate){.tris = {tri1}};
+    lith[1] = (Plate){.tris = {tri2}};
 }

src/include/gen.h

@@ -1,7 +1,7 @@
 #ifndef GEN_H
 #define GEN_H
 
-#include "col.h"
+#include "geom.h"
 
 #include <stdint.h>
 
@@ -14,20 +14,6 @@ typedef struct {
     int y;
 } Vec2;
 
-// A point on the world.
-typedef struct {
-    int x;
-    int y;
-} Pt;
-
-// A plate; contains a list of points on the world representing the plate's
-// vertices.
-typedef struct {
-    Col col;        // The color the plate should be drawn as.
-    uint8_t nverts; // The number of vertices the plate has.
-    Pt verts[10];    // The vertices of the plate.
-} Plate;
-
 // The asthenosphere; contains a grid of force vectors.
 extern Vec2 asth[WORLD_SZ][WORLD_SZ];
 // The lithosphere; contians a list of plates.

src/render.c

@@ -3,12 +3,18 @@
 
 #include <raylib.h>
 #include <stdio.h>
-#include <stdlib.h>
 
 Vector2 PointToVector2(Pt p) {
     Vector2 v;
-    v.x = (float)(p.x * 100) + 50;
-    v.y = (float)(p.y * 100) + 50;
+    v.x = (float)(p.x * 100) + 50.;
+    v.y = (float)(p.y * 100) + 50.;
+    return v;
+}
+
+Vector2 PointpToVector2(Pt* p) {
+    Vector2 v;
+    v.x = (float)(p->x * 100) + 50;
+    v.y = (float)(p->y * 100) + 50;
     return v;
 }
 
@@ -16,23 +22,13 @@ void render() {
     for (int i = 0; i < NPLATES; i++) {
         Plate plate = lith[i];
 
-        // Skip plates with less than 3 vertices (can't form a polygon).
-        if (plate.nverts < 3) continue;
-
-        // Convert the vertices from world coordinates (Pt) to screen
-        // coordinates (Vector2).
-        Vector2 screen_verts[10];
-        for (int j = 0; j < plate.nverts; j++) {
-            screen_verts[j] = PointToVector2(plate.verts[j]);
-        }
-
-        for (int j = 0; j < plate.nverts; j++) {
-            Vector2 p1 = screen_verts[j];
-            Vector2 p2 =
-                screen_verts[(j + 1) % plate.nverts]; // Loop back to the first
-                                                      // point
-            DrawLineV(p1, p2, WHITE);
-        }
+        DrawTriangleLines(
+            PointToVector2(plate.tris[0].a), PointToVector2(plate.tris[0].b),
+            PointToVector2(plate.tris[0].c), RED
+        );
+        printf(
+            ">>>>>>>>>>>>>>>>>>%i %i\n", plate.tris[0].a.x, plate.tris[0].a.y
+        );
     }
 
     for (int x = 0; x < WORLD_SZ; x++) {