first wip on sprites cars and rotations

.gitignore

@@ -0,0 +1,14 @@
+*.pyc
+bin/
+include/
+lib/
+lib64
+share/
+db.sqlite3
+os
+pip-selfcheck.json
+pyvenv.cfg
+dump.rdb
+kivy/.buildozer/
+.vscode
+

Pipfile

@@ -0,0 +1,18 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+black = "*"
+pylint = "*"
+ipdb = "*"
+
+[packages]
+pygame = "*"
+
+[requires]
+python_version = "3.7"
+
+[pipenv]
+allow_prereleases = true

Pipfile.lock

@@ -0,0 +1,273 @@
+{
+    "_meta": {
+        "hash": {
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+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.7"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "pygame": {
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+            "version": "==1.4.0"
+        },
+        "wcwidth": {
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+        "wrapt": {
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+            "version": "==1.11.2"
+        }
+    }
+}

main.py

@@ -0,0 +1,79 @@
+import pygame
+from pygame.locals import HWSURFACE, DOUBLEBUF
+import math
+
+FLAGS=  HWSURFACE | DOUBLEBUF #| FULLSCREEN
+
+GX = 450
+GY = 450
+CELL_COLOR = (80,80,80)
+CAR_SIZE=50
+pygame.init()
+
+IMG = pygame.image.load("car50.png")#.convert()
+
+def angle_to_vector(angle):
+    angle=angle*math.pi/180
+    return [math.cos(angle), math.sin(angle)]
+
+class Car(pygame.sprite.Sprite):
+    def __init__(self):
+        pygame.sprite.Sprite.__init__(self)
+        self.surface = pygame.Surface((CAR_SIZE, CAR_SIZE))
+        self.original_image = IMG
+        # self.image = pygame.Surface((CAR_SIZE, CAR_SIZE))
+        # self.image.fill((0,255,0))
+        # self.original_image = self.image
+
+        self.image = self.original_image
+
+        self.rect = self.surface.get_rect()
+        self.rect.center = (GX / 2, GY / 2)
+        self.speed = 5
+        self.heading = 0
+        self.heading_change = 0
+
+
+    # def draw(self,screen):
+    #     # self.surface.blit(self.image, (0,0))
+    #     screen.blit(self.surface, self.rect.center)
+
+    def update_position(self):
+        vec = angle_to_vector(self.heading)
+        old_center = self.rect.center
+        self.rect.center = (self.speed * vec[0] + old_center[0], self.speed * vec[1] + old_center[1])
+
+    def update(self):
+
+        # rotate
+        old_center = self.rect.center
+        self.image = pygame.transform.rotate(self.original_image, self.heading)
+        self.rect = self.image.get_rect()
+        self.rect.center = old_center
+        # self.update_position()
+
+        self.heading += self.heading_change
+        self.heading = self.heading % 360
+        # self.rect = self.image.get_rect(center=self.rect.center)
+        self.rect.x += self.speed
+
+
+screen = pygame.display.set_mode((GX, GY), FLAGS)
+all_cars = pygame.sprite.Group()
+car = Car()
+all_cars.add(car)
+car2 = Car()
+car2.heading_change = 5
+car2.speed = -2
+all_cars.add(car2)
+
+
+clock = pygame.time.Clock()
+while True :
+    screen.fill(CELL_COLOR)
+    all_cars.update()
+    all_cars.draw(screen)
+    pygame.draw.rect(screen, (125,255,125),pygame.Rect(car2.rect.center, (3,3)))
+
+    pygame.display.flip()
+    clock.tick(10)