缓慢但轻松的文本绘制#
这个例子展示了一种简单但非常慢的绘制文本的方法。
它的主要好处是易于使用。使用更复杂的方法 arcade.Text 对象的运行速度可以快数千倍。
看见 使用文本对象更好地绘制文本 对于中等性能的方法
看见 最快的文本绘制：侏儒批次 如果您想要尽可能好的性能
drawing_text.py#
1"""
2Example showing how to draw text to the screen.
3
4If Python and Arcade are installed, this example can be run from the command line with:
5python -m arcade.examples.drawing_text
6"""
7import arcade
8
9SCREEN_WIDTH = 1200
10SCREEN_HEIGHT = 800
11SCREEN_TITLE = "Drawing Text Example"
12DEFAULT_LINE_HEIGHT = 45
13DEFAULT_FONT_SIZE = 20
14
15
16class MyGame(arcade.Window):
17 """
18 Main application class.
19 """
20
21 def __init__(self, width, height, title):
22 super().__init__(width, height, title)
23
24 self.background_color = arcade.color.BEIGE
25 self.text_angle = 0
26 self.time_elapsed = 0.0
27
28 def on_update(self, delta_time):
29 self.text_angle += 1
30 self.time_elapsed += delta_time
31
32 def on_draw(self):
33 """
34 Render the screen.
35 """
36
37 # This command should happen before we start drawing. It will clear
38 # the screen to the background color, and erase what we drew last frame.
39 self.clear()
40
41 # Add the screen title
42 start_x = 0
43 start_y = SCREEN_HEIGHT - DEFAULT_LINE_HEIGHT * 1.5
44 arcade.draw_text("Text Drawing Examples",
45 start_x,
46 start_y,
47 arcade.color.BLACK,
48 DEFAULT_FONT_SIZE * 2,
49 width=SCREEN_WIDTH,
50 align="center")
51
52 # start_x and start_y make the start point for the text. We draw a dot to make it
53 # easy to see the text in relation to its start x and y.
54 start_x = 10
55 start_y = SCREEN_HEIGHT - DEFAULT_LINE_HEIGHT * 3
56 arcade.draw_text("Fonts:",
57 start_x,
58 start_y,
59 arcade.color.FRENCH_WINE,
60 DEFAULT_FONT_SIZE, bold=True)
61
62 # Move the y value down to create another line of text
63 start_y -= DEFAULT_LINE_HEIGHT
64 arcade.draw_text("Default Font (Arial)",
65 start_x,
66 start_y,
67 arcade.color.BLACK,
68 DEFAULT_FONT_SIZE)
69
70 # Show some built-in fonts
71 start_y -= DEFAULT_LINE_HEIGHT
72 arcade.draw_text("Kenney Blocks Font",
73 start_x,
74 start_y,
75 arcade.color.BLACK,
76 DEFAULT_FONT_SIZE,
77 font_name="Kenney Blocks")
78
79 start_y -= DEFAULT_LINE_HEIGHT
80 arcade.draw_text("Kenney Future Font",
81 start_x,
82 start_y,
83 arcade.color.BLACK,
84 DEFAULT_FONT_SIZE,
85 font_name="Kenney Future")
86
87 start_y -= DEFAULT_LINE_HEIGHT
88 arcade.draw_text("Kenney High Font",
89 start_x,
90 start_y,
91 arcade.color.BLACK,
92 DEFAULT_FONT_SIZE,
93 font_name="Kenney High")
94
95 start_y -= DEFAULT_LINE_HEIGHT
96 arcade.draw_text("Kenney High Square Font",
97 start_x,
98 start_y,
99 arcade.color.BLACK,
100 DEFAULT_FONT_SIZE,
101 font_name="Kenney High Square")
102
103 start_y -= DEFAULT_LINE_HEIGHT
104 arcade.draw_text("Kenney Mini Square Font",
105 start_x, start_y,
106 arcade.color.BLACK,
107 DEFAULT_FONT_SIZE,
108 font_name="Kenney Mini Square")
109
110 start_y -= DEFAULT_LINE_HEIGHT
111 arcade.draw_text("Kenney Pixel Font",
112 start_x, start_y,
113 arcade.color.BLACK,
114 DEFAULT_FONT_SIZE,
115 font_name="Kenney Pixel")
116
117 start_y -= DEFAULT_LINE_HEIGHT
118 arcade.draw_text("Kenney Pixel Square Font",
119 start_x, start_y,
120 arcade.color.BLACK,
121 DEFAULT_FONT_SIZE,
122 font_name="Kenney Pixel Square")
123
124 start_y -= DEFAULT_LINE_HEIGHT
125 arcade.draw_text("Kenney Rocket Font",
126 start_x, start_y,
127 arcade.color.BLACK,
128 DEFAULT_FONT_SIZE,
129 font_name="Kenney Rocket")
130
131 start_y -= DEFAULT_LINE_HEIGHT
132 arcade.draw_text("Kenney Rocket Square Font",
133 start_x, start_y,
134 arcade.color.BLACK,
135 DEFAULT_FONT_SIZE,
136 font_name="Kenney Rocket Square")
137
138 start_y -= DEFAULT_LINE_HEIGHT
139 # When trying to use system fonts, it can be risky to specify
140 # only a single font because someone else's computer might not
141 # have it installed. This is especially true if they run a
142 # different operating system. For example, if you are on Windows
143 # and a friend has a mac or Linux, they might not have the same
144 # fonts. Your game could look different or broken on their computer.
145 # One way around that is to provide multiple options for draw_text
146 # to try. It will use the first one it finds, and use Arial as a
147 # default if it can't find any of them.
148 # In the example below, draw_text is given a tuple of names for very
149 # similar fonts, each of which is common on a different major
150 # operating systems.
151 arcade.draw_text("Times New Roman (Or closest match on system)",
152 start_x, start_y,
153 arcade.color.BLACK,
154 DEFAULT_FONT_SIZE,
155 font_name=(
156 "Times New Roman", # Comes with Windows
157 "Times", # MacOS may sometimes have this variant
158 "Liberation Serif" # Common on Linux systems
159 ))
160
161 start_y -= DEFAULT_LINE_HEIGHT
162 arcade.draw_text("Multi-Line\ntext using\n\\n characters.",
163 start_x, start_y,
164 arcade.color.BLACK,
165 DEFAULT_FONT_SIZE / 2,
166 multiline=True,
167 width=300)
168
169 start_y -= DEFAULT_LINE_HEIGHT * 1.5
170 arcade.draw_text("Wrapping really long text automatically to a new line. "
171 "The quick brown fox jumped over the lazy dogs.",
172 start_x,
173 start_y,
174 arcade.color.BLACK,
175 DEFAULT_FONT_SIZE / 2,
176 multiline=True,
177 width=300)
178
179 # --- Column 2 ---
180 start_x = 750
181 start_y = SCREEN_HEIGHT - DEFAULT_LINE_HEIGHT * 3
182 arcade.draw_text("Text Positioning:",
183 start_x,
184 start_y,
185 arcade.color.FRENCH_WINE,
186 DEFAULT_FONT_SIZE,
187 bold=True)
188
189 # start_x and start_y make the start point for the text.
190 # We draw a dot to make it easy too see the text in relation to
191 # its start x and y.
192 start_y -= DEFAULT_LINE_HEIGHT
193 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
194 arcade.draw_text("Default of 'baseline' and 'Left'",
195 start_x,
196 start_y,
197 arcade.color.BLACK,
198 DEFAULT_FONT_SIZE)
199
200 start_y -= DEFAULT_LINE_HEIGHT
201 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
202 arcade.draw_text("'bottom' and 'left'",
203 start_x,
204 start_y,
205 arcade.color.BLACK,
206 DEFAULT_FONT_SIZE,
207 anchor_x="left",
208 anchor_y="bottom")
209
210 start_y -= DEFAULT_LINE_HEIGHT
211 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
212 arcade.draw_text("'top' and 'left'",
213 start_x, start_y,
214 arcade.color.BLACK,
215 DEFAULT_FONT_SIZE,
216 anchor_x="left",
217 anchor_y="top")
218
219 start_y -= DEFAULT_LINE_HEIGHT * 2
220 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
221 arcade.draw_text("'baseline' and 'center'",
222 start_x, start_y,
223 arcade.color.BLACK,
224 DEFAULT_FONT_SIZE,
225 anchor_x="center",
226 anchor_y="baseline")
227
228 start_y -= DEFAULT_LINE_HEIGHT
229 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
230 arcade.draw_text("'baseline' and 'right'",
231 start_x,
232 start_y,
233 arcade.color.BLACK,
234 DEFAULT_FONT_SIZE,
235 anchor_x="right",
236 anchor_y="baseline")
237
238 start_y -= DEFAULT_LINE_HEIGHT
239 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
240 arcade.draw_text("'center' and 'center'",
241 start_x,
242 start_y,
243 arcade.color.BLACK,
244 DEFAULT_FONT_SIZE,
245 anchor_x="center",
246 anchor_y="center")
247
248 start_y -= DEFAULT_LINE_HEIGHT * 4
249 # start_x = 0
250 # start_y = 0
251 arcade.draw_point(start_x, start_y, arcade.color.BARN_RED, 5)
252 arcade.draw_text("Rotating Text",
253 start_x, start_y,
254 arcade.color.BLACK,
255 DEFAULT_FONT_SIZE,
256 anchor_x="center",
257 anchor_y="center",
258 rotation=self.text_angle)
259
260
261def main():
262 MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
263 arcade.run()
264
265
266if __name__ == "__main__":
267 main()