snow galleon
Hello I have a ArrayList of objects that have a method, I am trying to iterate over it using a for loop. But the item in between pipes is of type *const T but my method takes *T. How can i fix this issue?
// Library imports here
// This is the object
const Boid = struct {
const boidRadius = 5;
const boidPointerLen = 10;
pos: rl.Vector2 = rl.Vector2{ .x = width / 2, .y = height / 2 },
vel: rl.Vector2 = rl.Vector2{ .x = 1, .y = 1 },
acc: rl.Vector2 = rl.Vector2{ .x = 0, .y = 0 },
// The method
fn draw(self: *Boid) void {
const velAngle = std.math.atan2(f32, self.vel.y, self.vel.x);
rl.DrawLineV(self.pos, rl.Vector2{ .x = (std.math.cos(velAngle) * boidPointerLen) + self.pos.x, .y = (std.math.sin(velAngle) * boidPointerLen) + self.pos.y }, rl.RAYWHITE);
rl.DrawCircleV(self.pos, boidRadius, rl.RAYWHITE);
}
};
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
const allocator = gpa.allocator();
defer _ = gpa.deinit();
// var boids = try allocator.alloc(Boid, boidCount);
// defer allocator.free(boids);
var boids = std.ArrayList(Boid).init(allocator);
defer boids.deinit();
var i: usize = 0;
while (i < boidCount) : (i += 1) {
try boids.append(Boid{});
}
// Some code...
while (!rl.WindowShouldClose()) {
// Some code...
// Here is the problem
for (boids.items) |boid| {
boid.draw();
}
}
}
noble jungle