Init

engine.py

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+import math
+
+class Engine:
+    rpm = 0
+    throttle = 0
+    load = 0
+    instant_torque = 0
+    gear = 0
+    flywheel_inertia = 0
+    idle_rpm = 750
+    max_rpm = 6500
+
+    fuel_rate = 0
+    afr = 0
+    coolant_temp = 0
+    oil_temp = 0
+
+    ignition_timing = 0
+
+    ambient_temp = 0
+    altitude = 0
+    intake_pressure = 0
+    vehicle_mass = 0
+    drivetrain_loss = 0
+
+    oil_pressure = 0
+    turbo_boost = 0
+    kr = 0
+    exhaust_temp = 0
+
+    def start(self):
+        rpm = 250
+    
+    def update(self, throttle, load, dt):
+        
+        if not self.running:
+            return
+
+        self.throttle = throttle
+        self.load = load
+
+        # Apply simplified engine RPM dynamics
+        rpm_change = (throttle - load) * self.torque_curve(self.rpm) / self.flywheel_inertia
+        self.rpm += rpm_change * dt
+        self.rpm = max(self.idle_rpm, min(self.rpm, self.max_rpm))
+
+        self.torque = self.torque_curve(self.rpm) * throttle
+        self.fuel_rate = self.rpm * throttle * self.fuel_efficiency
+
+        self._update_temps(dt)

main.py

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+# Example file showing a circle moving on screen
+import pygame
+import math
+from engine import Engine
+
+# pygame setup
+pygame.init()
+screen = pygame.display.set_mode((1280, 720))
+clock = pygame.time.Clock()
+running = True
+dt = 0
+
+player_pos = pygame.Vector2(screen.get_width() / 2, screen.get_height() / 2)
+
+rpm_pos = pygame.Vector2(screen.get_width() * 0.25, screen.get_height() / 2)
+spd_pos = pygame.Vector2(screen.get_width() * 0.75, screen.get_height() / 2)
+
+gauge_radius = screen.get_height() / 5
+
+# Angle for gauge
+angle_rad = math.radians(145)
+
+needle_color = "black"
+needle_width = 4
+tip_radius = needle_width
+
+offset_vector = pygame.Vector2(
+    math.cos(angle_rad) * gauge_radius,
+    math.sin(angle_rad) * gauge_radius
+)
+
+e = engine()
+
+while running:
+    # poll for events
+    # pygame.QUIT event means the user clicked X to close your window
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            running = False
+
+    # fill the screen with a color to wipe away anything from last frame
+    screen.fill("white")
+
+    # RPM
+    # Min = 0 at 45 degrees
+    # Max = 8 at 315 degrees
+    pygame.draw.circle(screen, "red", rpm_pos, gauge_radius)
+    rpm_tip = rpm_pos + offset_vector
+    pygame.draw.line(screen, needle_color, rpm_pos, rpm_tip, needle_width)
+    pygame.draw.circle(screen, needle_color, rpm_tip, tip_radius)
+
+    # Trans Speed
+    # Min = 0 at 45 degrees
+    # Max = 160 at 315 degrees
+    pygame.draw.circle(screen, "red", spd_pos, gauge_radius)
+    spd_tip = spd_pos + offset_vector
+    pygame.draw.line(screen, needle_color, spd_pos, spd_tip, needle_width)
+    pygame.draw.circle(screen, needle_color, spd_tip, tip_radius)
+
+    pygame.draw.circle(screen, "red", player_pos, 40)
+
+    keys = pygame.key.get_pressed()
+    if keys[pygame.K_w]:
+        player_pos.y -= 300 * dt
+    if keys[pygame.K_s]:
+        player_pos.y += 300 * dt
+    if keys[pygame.K_a]:
+        player_pos.x -= 300 * dt
+    if keys[pygame.K_d]:
+        player_pos.x += 300 * dt
+
+    # flip() the display to put your work on screen
+    pygame.display.flip()
+
+    # limits FPS to 60
+    # dt is delta time in seconds since last frame, used for framerate-
+    # independent physics.
+    dt = clock.tick(60) / 1000
+
+pygame.quit()