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Casting 60 rays

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This commit is contained in:
Daniele Verducci 2023-01-02 19:55:09 +01:00
parent 904d817203
commit ec11c67f06
1 changed files with 15 additions and 7 deletions
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22
raycaster.py
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@ -19,6 +19,8 @@ RAY_LENGTH = 100
MAP_SCALE = 80 MAP_SCALE = 80
DOF = 8 # Depth Of Field DOF = 8 # Depth Of Field
DEGREE_IN_RADIANTS = 0.01745329
MAP = [ MAP = [
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1,
@ -60,9 +62,9 @@ class Main:
if event.type == sdl2.SDL_KEYDOWN: if event.type == sdl2.SDL_KEYDOWN:
# Rotate player # Rotate player
if event.key.keysym.sym == sdl2.SDLK_LEFT: if event.key.keysym.sym == sdl2.SDLK_LEFT:
self.player_position["r"] = self.player_position["r"] - 0.1 self.player_position["r"] = self.player_position["r"] - 5*DEGREE_IN_RADIANTS
elif event.key.keysym.sym == sdl2.SDLK_RIGHT: elif event.key.keysym.sym == sdl2.SDLK_RIGHT:
self.player_position["r"] = self.player_position["r"] + 0.1 self.player_position["r"] = self.player_position["r"] + 5*DEGREE_IN_RADIANTS
# Compute deltax and deltay based on player direction # Compute deltax and deltay based on player direction
player_delta_x = math.cos(self.player_position["r"]) * PLAYER_SPEED player_delta_x = math.cos(self.player_position["r"]) * PLAYER_SPEED
@ -108,6 +110,8 @@ class Main:
"x": int(self.player_position["x"] + math.cos(self.player_position["r"]) * 50), # deltaX + playerX "x": int(self.player_position["x"] + math.cos(self.player_position["r"]) * 50), # deltaX + playerX
"y": int(self.player_position["y"] + math.sin(self.player_position["r"]) * 50) # deltaY + playerY "y": int(self.player_position["y"] + math.sin(self.player_position["r"]) * 50) # deltaY + playerY
} }
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"]))
def draw2Dmap(self): def draw2Dmap(self):
# 2D map # 2D map
@ -121,14 +125,18 @@ class Main:
def drawRays(self): def drawRays(self):
# Casts rays for raycasting # Casts rays for raycasting
rayAngle = self.player_position["r"] playerAngle = self.player_position["r"]
for r in range(1):
# Cast 60 rays from -30° to +30° (60° viewing angle)
for r in range(60):
rayAngle = playerAngle - (r - 30)*DEGREE_IN_RADIANTS
# Check horizontal lines # Check horizontal lines
dof = 0 # Depth of field dof = 0 # Depth of field
if rayAngle == 0 or rayAngle == math.pi: if rayAngle == 0 or rayAngle == math.pi:
# Looking left or right (ray will never intersect parallel lines) # Looking left or right (ray will never intersect parallel lines)
rayY = self.player_position["y"] rayY = self.player_position["y"]
rayX = self.player_position["x"] rayX = self.player_position["x"] + DOF * MAP_SCALE
dof = DOF # Set depth of field to maximum to avoid unneeded checks dof = DOF # Set depth of field to maximum to avoid unneeded checks
elif rayAngle > math.pi: elif rayAngle > math.pi:
# Looking up # Looking up
@ -150,7 +158,7 @@ class Main:
mapX = int(rayX / MAP_SCALE) mapX = int(rayX / MAP_SCALE)
mapY = int(rayY / MAP_SCALE) mapY = int(rayY / MAP_SCALE)
mapArrayPosition = mapY * MAP_SIZE + mapX mapArrayPosition = mapY * MAP_SIZE + mapX
if mapArrayPosition < MAP_SIZE*MAP_SIZE and MAP[mapArrayPosition] != 0: if mapArrayPosition >= 0 and mapArrayPosition < MAP_SIZE*MAP_SIZE and MAP[mapArrayPosition] != 0:
dof = 8 # Hit the wall: we are done, no need to do other checks dof = 8 # Hit the wall: we are done, no need to do other checks
else: else:
# Didn't hit the wall: check successive horizontal line # Didn't hit the wall: check successive horizontal line
@ -171,7 +179,7 @@ class Main:
#if rayAngle == 0 or rayAngle == math.pi: #if rayAngle == 0 or rayAngle == math.pi:
# Looking up or down (ray will never intersect vertical lines) # Looking up or down (ray will never intersect vertical lines)
rayX = self.player_position["x"] rayX = self.player_position["x"]
rayY = self.player_position["y"] rayY = self.player_position["y"] + DOF * MAP_SCALE
dof = DOF # Set depth of field to maximum to avoid unneeded checks dof = DOF # Set depth of field to maximum to avoid unneeded checks
elif rayAngle > math.pi * 0.5 and rayAngle < math.pi * 1.5: elif rayAngle > math.pi * 0.5 and rayAngle < math.pi * 1.5:
# Looking right # Looking right