Basic rendering of asthenosphere and lithosphere.

src/gen.c

@@ -84,7 +84,10 @@ Vec2 asth[WORLD_SZ][WORLD_SZ] = {
     },
 };
 
-Plate lith[2] = {
-    (Plate){COL_BLU, 4, {(Pt){0, 0}, (Pt){4, 0}, (Pt){0, 8}, (Pt){4, 8}}},
-    (Plate){COL_RED, 4, {(Pt){4, 0}, (Pt){8, 0}, (Pt){8, 8}, (Pt){4, 8}}}
+Plate lith[NPLATES] = {
+    (Plate){.col = COL_BLU,
+            .nverts = 4,
+            .verts = {(Pt){0, 0}, (Pt){7, 0}, (Pt){7, 5}, (Pt){4, 4}}},
+    (Plate){COL_RED, 4, {(Pt){0, 0}, (Pt){4, 4}, (Pt){2, 7}, (Pt){0, 7}}},
+    (Plate){COL_GRN, 4, {(Pt){4, 4}, (Pt){7, 5}, (Pt){7, 7}, (Pt){2, 7}}},
 };

src/include/gen.h

@@ -6,6 +6,7 @@
 #include <stdint.h>
 
 #define WORLD_SZ 8
+#define NPLATES 3
 
 // A two dimensional vector.
 typedef struct {
@@ -30,7 +31,7 @@ typedef struct {
 // The asthenosphere; contains a grid of force vectors.
 extern Vec2 asth[WORLD_SZ][WORLD_SZ];
 // The lithosphere; contians a list of plates.
-extern Plate lith[2];
+extern Plate lith[NPLATES];
 
 void gen(void);
 

src/render.c

@@ -3,16 +3,17 @@
 
 #include <raylib.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 Vector2 PointToVector2(Pt p) {
     Vector2 v;
-    v.x = (float)p.x * CELL_SZ;
-    v.y = (float)p.y * CELL_SZ;
+    v.x = (float)(p.x * 100) + 50;
+    v.y = (float)(p.y * 100) + 50;
     return v;
 }
 
 void render() {
-    for (int i = 0; i < 2; i++) {
+    for (int i = 0; i < NPLATES; i++) {
         Plate plate = lith[i];
 
         // Skip plates with less than 3 vertices (can't form a polygon).
@@ -25,35 +26,23 @@ void render() {
             screen_verts[j] = PointToVector2(plate.verts[j]);
         }
 
-        if (plate.nverts == 3) {
-            DrawTriangle(
-                screen_verts[0], screen_verts[1], screen_verts[2],
-                (Color){plate.col.r, plate.col.g, plate.col.b, plate.col.a}
-            );
-
-        } else if (plate.nverts == 4) {
-            // Draw a quadrilateral (split into two triangles for filling)
-            // Triangle 1: V0, V1, V2
-            DrawTriangle(
-                screen_verts[0], screen_verts[1], screen_verts[2],
-                (Color){plate.col.r, plate.col.g, plate.col.b, plate.col.a}
-
-            );
-            // Triangle 2: V0, V2, V3 (Uses V0 and V2 as the base diagonal)
-            DrawTriangle(
-                screen_verts[0], screen_verts[2], screen_verts[3],
-                (Color){plate.col.r, plate.col.g, plate.col.b, plate.col.a}
-            );
-        }
-
-        // OPTIONAL: Draw the plate outline to make it clearer
-        /*
         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, BLACK);
-            }*/
+            DrawLineV(p1, p2, WHITE);
+        }
+    }
+
+    for (int x = 0; x < WORLD_SZ; x++) {
+        for (int y = 0; y < WORLD_SZ; y++) {
+            Vector2 v = PointToVector2((Pt){x, y});
+            DrawCircleV(v, 4.f, WHITE);
+            DrawLineV(
+                v, (Vector2){v.x + asth[x][y].x * 8, v.y + asth[x][y].y * 8},
+                WHITE
+            );
+        }
     }
 }