https://www.raylib.com/examples/web/core/loader.html?name=core_input_mouse

The original C example, edited for easier comparison:

#include "raylib.h"

int main(void)
{
   const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [core] example - mouse input");

    Vector2 ballPosition = { -100.0f, -100.0f };
    Color ballColor = DARKBLUE;

    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
 
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        ballPosition = GetMousePosition();

        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) ballColor = MAROON;
        else if (IsMouseButtonPressed(MOUSE_MIDDLE_BUTTON)) ballColor = LIME;
        else if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) ballColor = DARKBLUE;

        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawCircleV(ballPosition, 40, ballColor);

            DrawText("move ball with mouse and click mouse button to change color", 10, 10, 20, DARKGRAY);

        EndDrawing();
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    CloseWindow();        // Close window and OpenGL context

    return 0;
}

The Rust version:

use raylib::prelude::MouseButton::*;
use raylib::prelude::*;

fn main() {
    let screen_width = 800.0;
    let screen_height = 450.0;

    let (mut rl, thread) = raylib::init()
        .size(screen_width as i32, screen_height as i32)
        .title("Raylib [core] example - mouse input")
        .build();

    let mut ball_color = Color::DARKBLUE;

    rl.set_target_fps(60); // Set our game to run at 60 frames-per-second

    while !rl.window_should_close() {
        if rl.is_mouse_button_pressed(MOUSE_LEFT_BUTTON) {
            ball_color = Color::MAROON;
        } else if rl.is_mouse_button_pressed(MOUSE_MIDDLE_BUTTON) {
            ball_color = Color::LIME;
        } else if rl.is_mouse_button_pressed(MOUSE_RIGHT_BUTTON) {
            ball_color = Color::DARKBLUE;
        }

        let mut d = rl.begin_drawing(&thread);

        d.clear_background(Color::RAYWHITE);
        d.draw_text(
            "move ball with mouse and click mouse button to change color",
            10,
            10,
            20,
            Color::DARKGRAY,
        );

        d.draw_circle_v(d.get_mouse_position(), 50.0, ball_color);
    }
}

Tags: examples in raylib-rs, mouse input