shader-caching.py

from panda3d.core import *


with open("fancy-shader.vtx.glsl", "w") as handle:
    handle.write("""
    #version 400

    void main() {}
    """)


with open("fancy-shader.frag.glsl", "w") as handle:
    handle.write("""
    #version 400

    void main() {}
    """)
    

fancy_shader_a = Shader.load(Shader.SL_GLSL, "fancy-shader.vtx.glsl", "fancy-shader.frag.glsl")
print("Instance A:", fancy_shader_a, "ptr:", fancy_shader_a.this)

fancy_shader_b = Shader.load(Shader.SL_GLSL, "fancy-shader.vtx.glsl", "fancy-shader.frag.glsl")
print("Instance B:", fancy_shader_b, "ptr:", fancy_shader_b.this)

print("Modifying fragment shader")
with open("fancy-shader.vtx.glsl", "a") as handle:
    handle.write("// comment\n")

fancy_shader_c = Shader.load(Shader.SL_GLSL, "fancy-shader.vtx.glsl", "fancy-shader.frag.glsl")
print("Instance C:", fancy_shader_c, "ptr:", fancy_shader_c.this)