def raycast(self):
# looking right
for rayAngleDegrees in frange(self.playerFacingDegrees, self.playerFacingDegrees + Raycast.FIELD_OF_VIEW_DEGREES, Raycast.ANGLE_INCREMENT_DEGREES):
xIncrement = self.cosTable[int(rayAngleDegrees % 360)]
yIncrement = self.sinTable[int(rayAngleDegrees % 360)]
testX = self.playerX;
testY = self.playerY;
rayLength = 1
blockColor = 0
try:
while Generator.isWall(blockColor) == False and Generator.isDoor(blockColor) == False:
testX += xIncrement
testY += yIncrement
rayLength += 1
worldX = int((testX / Raycast.WORLD_BLOCK_SIZE))
worldY = int((testY / Raycast.WORLD_BLOCK_SIZE))
blockColor = self.world[worldY][worldX]
except IndexError as msg:
print(msg)
# remove door when near
if Generator.isDoor(blockColor) and rayLength < Raycast.WORLD_BLOCK_SIZE:
self.world[worldY][worldX] = Generator.FLOOR
# set start x for rectangles
x = ((rayAngleDegrees - self.playerFacingDegrees) * Raycast.DRAW_LINE_WIDTH) / Raycast.ANGLE_INCREMENT_DEGREES
# compensate for fisheye view as ray is cast from center
beta = rayAngleDegrees - self.playerFacingDegrees - Raycast.HALF_FIELD_OF_VIEW_DEGREES
rayLength = rayLength * math.cos(beta * Raycast.RADIANS_CONVERSION_FACTOR)
# scale the wall according to distance, if the rayLength is shorter then the wall must be drawn bigger
wallHeight = (1000 / rayLength) * 2
if wallHeight > Raycast.SCREEN_HEIGHT:
wallHeight = Raycast.SCREEN_HEIGHT
halfWallHeight = wallHeight / 2
self.drawCeiling(x, halfWallHeight)
self.drawWall(x, halfWallHeight, blockColor)
self.drawFloor(x, halfWallHeight)
def drawWall(self, x, halfWallHeight, itemColor):
# x1,y1,x2,y2
fillColor = self.DOOR_COLOR if Generator.isDoor(itemColor) else COLORS[int(itemColor)]
self.canvas.create_rectangle(x, Raycast.SCREEN_CENTER_Y - halfWallHeight, x + Raycast.DRAW_LINE_WIDTH, Raycast.SCREEN_CENTER_Y + halfWallHeight, width=0, fill=fillColor)
