pyopengl如何渲染文字

发布于 2025-02-05 05:05:44 字数 376 浏览 2 评论 0原文

我使用此功能渲染文本，但是第一个参数将报告错误。我不知道如何使用它

glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, "text to render")
  ctypes.ArgumentError: argument 2: <class 'TypeError'>: wrong type

原文

I use this function to render text, but the first parameter will report an error. I don't know how to use it

glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, "text to render")
  ctypes.ArgumentError: argument 2: <class 'TypeError'>: wrong type

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可爱暴击 2025-02-12 05:05:45

glutbitmapcharacter的第二个参数是代表一个字符的积分数字。您必须使用 -loop的来编写字符串，然后用 ord ：

for c in text:
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, ord(c))

当使用glutbitmapstring时，该参数必须是二进制格式的字符串（b“ text to render” /代码>）。例如：

text = b"Hello World"
glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text)

或 encdode> encdode 字符串

text = "Hello World"
glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text.encode('ascii'))

最小示例：

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

def text(x, y, color, text):
    glColor3fv(color)
    glWindowPos2f(x, y)

    #for c in text:
    #    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, ord(c))

    glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text.encode('ascii'))

def display():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    text(100, 100, (1, 0, 0), "Hello World!")
    glutSwapBuffers()
    glutPostRedisplay()

glutInit(sys.argv)
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA)
glutInitWindowSize(400, 200)
glutCreateWindow(b"OpenGL Window")
glutDisplayFunc(display)
glutMainLoop()

The 2nd argument of glutBitmapCharacter is an integral number representing one character. You have to use a for-loop to write a string and convert each character with ord:

for c in text:
    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, ord(c))

When using glutBitmapString, the argument must be a string in binary format (b"text to render"). e.g.:

text = b"Hello World"
glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text)

or encdode the string

text = "Hello World"
glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text.encode('ascii'))

Minimal example:

from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL.GLUT import *

def text(x, y, color, text):
    glColor3fv(color)
    glWindowPos2f(x, y)

    #for c in text:
    #    glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, ord(c))

    glutBitmapString(GLUT_BITMAP_TIMES_ROMAN_24, text.encode('ascii'))

def display():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    text(100, 100, (1, 0, 0), "Hello World!")
    glutSwapBuffers()
    glutPostRedisplay()

glutInit(sys.argv)
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA)
glutInitWindowSize(400, 200)
glutCreateWindow(b"OpenGL Window")
glutDisplayFunc(display)
glutMainLoop()

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