penguin86/python-sdl-racing-sim
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Better kerb animation and color

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Daniele Verducci (Slimpenguin) 2023-01-15 22:27:14 +01:00
parent eddb03e8a3
commit 5e23b1278b
1 changed files with 19 additions and 11 deletions
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racing-sim.py
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@ -24,19 +24,20 @@ import sdl2.ext
import math import math
import time import time
RENDER_WIDTH = 128 RENDER_WIDTH = 640
RENDER_HEIGHT = 96 RENDER_HEIGHT = 480
RENDER_SCALE = 8 RENDER_SCALE = 2
WIN_WIDTH = RENDER_WIDTH * RENDER_SCALE WIN_WIDTH = RENDER_WIDTH * RENDER_SCALE
WIN_HEIGHT = RENDER_HEIGHT * RENDER_SCALE WIN_HEIGHT = RENDER_HEIGHT * RENDER_SCALE
SKY_COLOR = [0,127,255] SKY_COLOR = [0,127,255]
GRASS_COLOR = [0,127,0] GRASS_COLOR = [0,127,0]
KERB_COLOR = [255,0,0] KERB_COLOR_1 = [255,0,0]
KERB_COLOR_2 = [255,255,255]
ROAD_COLOR = [127,127,127] ROAD_COLOR = [127,127,127]
KERB_WIDTH = 0.05 KERB_WIDTH = 0.05
PLAYER_MAX_SPEED = 1.0 PLAYER_MAX_SPEED = 1.0
PLAYER_SPEED_INCREMENT = 1.0 PLAYER_SPEED_INCREMENT = 0.5
class Main: class Main:
@ -118,13 +119,14 @@ class Main:
roadCenterPixels = (RENDER_WIDTH - roadWidth) / 2 roadCenterPixels = (RENDER_WIDTH - roadWidth) / 2
kerbWidth = KERB_WIDTH * RENDER_WIDTH * perspectiveMult kerbWidth = KERB_WIDTH * RENDER_WIDTH * perspectiveMult
# Calculate perspective: the lines near the user are taller than the one further away # Kerb color: Calculate perspective: the lines near the user are taller than the one further away
# This is a modified sine, "stretched" based on the distance (the y axis) # This is a modified sine, "stretched" based on the distance (the y axis)
colorModifier = 0 inverter = math.cos(50.0 * math.pow(1.0 - perspectiveMult, 2) + self.distance * 30)
if math.sin(50.0 * math.pow(1.0 - perspectiveMult, 2) + self.distance * 30) > 0: if inverter > 0.7 or inverter < -0.7:
colorModifier = 64 sdl2.SDL_SetRenderDrawColor(self.renderer, KERB_COLOR_1[0], KERB_COLOR_1[1], KERB_COLOR_1[2], sdl2.SDL_ALPHA_OPAQUE)
else:
sdl2.SDL_SetRenderDrawColor(self.renderer, KERB_COLOR_2[0], KERB_COLOR_2[1], KERB_COLOR_2[2], sdl2.SDL_ALPHA_OPAQUE)
sdl2.SDL_SetRenderDrawColor(self.renderer, KERB_COLOR[0] + colorModifier, KERB_COLOR[1] + colorModifier, KERB_COLOR[2] + colorModifier, sdl2.SDL_ALPHA_OPAQUE)
# Left Kerb # Left Kerb
x = roadCenterPixels - roadWidthPixels / 2 - kerbWidth x = roadCenterPixels - roadWidthPixels / 2 - kerbWidth
self.drawScaledHLine(x, y, kerbWidth) self.drawScaledHLine(x, y, kerbWidth)
@ -132,7 +134,13 @@ class Main:
x = roadCenterPixels + roadWidthPixels / 2 x = roadCenterPixels + roadWidthPixels / 2
self.drawScaledHLine(x, y, kerbWidth) self.drawScaledHLine(x, y, kerbWidth)
sdl2.SDL_SetRenderDrawColor(self.renderer, GRASS_COLOR[0] + colorModifier, GRASS_COLOR[1] + colorModifier, GRASS_COLOR[2] + colorModifier, sdl2.SDL_ALPHA_OPAQUE) # Grass color: Calculate perspective: the lines near the user are taller than the one further away
# This is a modified sine, "stretched" based on the distance (the y axis)
if math.sin(50.0 * math.pow(1.0 - perspectiveMult, 2) + self.distance * 30) > 0:
sdl2.SDL_SetRenderDrawColor(self.renderer, GRASS_COLOR[0], GRASS_COLOR[1], GRASS_COLOR[2], sdl2.SDL_ALPHA_OPAQUE)
else:
sdl2.SDL_SetRenderDrawColor(self.renderer, GRASS_COLOR[0] + 63, GRASS_COLOR[1] + 63, GRASS_COLOR[2] + 63, sdl2.SDL_ALPHA_OPAQUE)
# Left Grass # Left Grass
xEnd = roadCenterPixels - roadWidthPixels / 2 - kerbWidth xEnd = roadCenterPixels - roadWidthPixels / 2 - kerbWidth
self.drawScaledHLine(0, y, xEnd) # xEnd = length, because xStart = 0 self.drawScaledHLine(0, y, xEnd) # xEnd = length, because xStart = 0