Casting 60 rays
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904d817203
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22
raycaster.py
22
raycaster.py
@ -19,6 +19,8 @@ RAY_LENGTH = 100
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MAP_SCALE = 80
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DOF = 8 # Depth Of Field
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DEGREE_IN_RADIANTS = 0.01745329
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MAP = [
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 0, 0, 0, 1, 0, 0, 1,
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@ -60,9 +62,9 @@ class Main:
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if event.type == sdl2.SDL_KEYDOWN:
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# Rotate player
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if event.key.keysym.sym == sdl2.SDLK_LEFT:
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self.player_position["r"] = self.player_position["r"] - 0.1
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self.player_position["r"] = self.player_position["r"] - 5*DEGREE_IN_RADIANTS
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elif event.key.keysym.sym == sdl2.SDLK_RIGHT:
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self.player_position["r"] = self.player_position["r"] + 0.1
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self.player_position["r"] = self.player_position["r"] + 5*DEGREE_IN_RADIANTS
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# Compute deltax and deltay based on player direction
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player_delta_x = math.cos(self.player_position["r"]) * PLAYER_SPEED
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@ -108,6 +110,8 @@ class Main:
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"x": int(self.player_position["x"] + math.cos(self.player_position["r"]) * 50), # deltaX + playerX
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"y": int(self.player_position["y"] + math.sin(self.player_position["r"]) * 50) # deltaY + playerY
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}
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sdl2.ext.draw.line(self.mapSurface, sdl2.ext.Color(255,0,0,255), (self.player_position["x"], self.player_position["y"], ray["x"], ray["y"]))
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def draw2Dmap(self):
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# 2D map
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@ -121,14 +125,18 @@ class Main:
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def drawRays(self):
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# Casts rays for raycasting
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rayAngle = self.player_position["r"]
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for r in range(1):
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playerAngle = self.player_position["r"]
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# Cast 60 rays from -30° to +30° (60° viewing angle)
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for r in range(60):
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rayAngle = playerAngle - (r - 30)*DEGREE_IN_RADIANTS
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# Check horizontal lines
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dof = 0 # Depth of field
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if rayAngle == 0 or rayAngle == math.pi:
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# Looking left or right (ray will never intersect parallel lines)
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rayY = self.player_position["y"]
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rayX = self.player_position["x"]
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rayX = self.player_position["x"] + DOF * MAP_SCALE
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dof = DOF # Set depth of field to maximum to avoid unneeded checks
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elif rayAngle > math.pi:
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# Looking up
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@ -150,7 +158,7 @@ class Main:
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mapX = int(rayX / MAP_SCALE)
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mapY = int(rayY / MAP_SCALE)
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mapArrayPosition = mapY * MAP_SIZE + mapX
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if mapArrayPosition < MAP_SIZE*MAP_SIZE and MAP[mapArrayPosition] != 0:
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if mapArrayPosition >= 0 and mapArrayPosition < MAP_SIZE*MAP_SIZE and MAP[mapArrayPosition] != 0:
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dof = 8 # Hit the wall: we are done, no need to do other checks
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else:
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# Didn't hit the wall: check successive horizontal line
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@ -171,7 +179,7 @@ class Main:
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#if rayAngle == 0 or rayAngle == math.pi:
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# Looking up or down (ray will never intersect vertical lines)
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rayX = self.player_position["x"]
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rayY = self.player_position["y"]
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rayY = self.player_position["y"] + DOF * MAP_SCALE
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dof = DOF # Set depth of field to maximum to avoid unneeded checks
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elif rayAngle > math.pi * 0.5 and rayAngle < math.pi * 1.5:
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# Looking right
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