Some work on the examples

examples/core/3d_camera_first_person.zig

@@ -0,0 +1,83 @@
+// raylib-zig (c) Nikolas Wipper 2023
+
+const rl = @import("raylib");
+const rlm = @import("raylib-math");
+
+const MAX_COLUMNS = 20;
+
+pub fn main() anyerror!void {
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const screenWidth = 800;
+    const screenHeight = 450;
+
+    rl.InitWindow(screenWidth, screenHeight, "raylib-zig [core] example - 3d camera first person");
+
+    var camera = rl.Camera3D{
+        .position = rl.Vector3{ .x = 4, .y = 2, .z = 4 },
+        .target = rl.Vector3{ .x = 0, .y = 1.8, .z = 0 },
+        .up = rl.Vector3{ .x = 0, .y = 1, .z = 0 },
+        .fovy = 60,
+        .projection = rl.CameraProjection.CAMERA_PERSPECTIVE,
+    };
+
+    var heights: [MAX_COLUMNS]f32 = undefined;
+    var positions: [MAX_COLUMNS]rl.Vector3 = undefined;
+    var colors: [MAX_COLUMNS]rl.Color = undefined;
+
+    for (heights) |_, i| {
+        heights[i] = @intToFloat(f32, rl.GetRandomValue(1, 12));
+        positions[i] = rl.Vector3{ .x = @intToFloat(f32, rl.GetRandomValue(-15, 15)), .y = heights[i] / 2.0, .z = @intToFloat(f32, rl.GetRandomValue(-15, 15)) };
+        colors[i] = rl.Color{ .r = @intCast(u8, rl.GetRandomValue(20, 255)), .g = @intCast(u8, rl.GetRandomValue(10, 55)), .b = 30, .a = 255 };
+    }
+
+    camera.setMode(rl.CameraMode.CAMERA_FIRST_PERSON);
+
+    rl.SetTargetFPS(60); // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!rl.WindowShouldClose()) { // Detect window close button or ESC key
+        // Update
+        //----------------------------------------------------------------------------------
+        camera.update();
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        rl.BeginDrawing();
+
+        rl.ClearBackground(rl.RAYWHITE);
+
+        camera.begin();
+
+        // Draw ground
+        rl.DrawPlane(rl.Vector3{ .x = 0.0, .y = 0.0, .z = 0.0 }, rl.Vector2{ .x = 32.0, .y = 32.0 }, rl.LIGHTGRAY);
+        rl.DrawCube(rl.Vector3{ .x = -16.0, .y = 2.5, .z = 0.0 }, 1.0, 5.0, 32.0, rl.BLUE); // Draw a blue wall
+        rl.DrawCube(rl.Vector3{ .x = 16.0, .y = 2.5, .z = 0.0 }, 1.0, 5.0, 32.0, rl.LIME); // Draw a green wall
+        rl.DrawCube(rl.Vector3{ .x = 0.0, .y = 2.5, .z = 16.0 }, 32.0, 5.0, 1.0, rl.GOLD); // Draw a yellow wall
+
+        // Draw some cubes around
+        for (heights) |height, i| {
+            rl.DrawCube(positions[i], 2.0, height, 2.0, colors[i]);
+            rl.DrawCubeWires(positions[i], 2.0, height, 2.0, rl.MAROON);
+        }
+
+        camera.end();
+
+        rl.DrawRectangle(10, 10, 220, 70, rl.Fade(rl.SKYBLUE, 0.5));
+        rl.DrawRectangleLines(10, 10, 220, 70, rl.BLUE);
+
+        rl.DrawText("First person camera default controls:", 20, 20, 10, rl.BLACK);
+        rl.DrawText("- Move with keys: W, A, S, D", 40, 40, 10, rl.DARKGRAY);
+        rl.DrawText("- Mouse move to look around", 40, 60, 10, rl.DARKGRAY);
+
+        rl.EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    rl.CloseWindow(); // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+}