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Improve pause behaviour of opengl_underlay example for C++

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Ported #9360 from Rust to C++
This commit is contained in:
Simon Hausmann 2025-09-08 11:31:05 +00:00 • committed by Simon Hausmann
parent 7e66df5d28
commit d0f482c23b
1 changed files with 13 additions and 3 deletions
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16
examples/opengl_underlay/main.cpp
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@ -166,12 +166,19 @@ private:
auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::steady_clock::now() - start_time);
glUniform1f(effect_time_location, elapsed.count());
// Handle the rotation and freezing of rotation via the UI toggle.
if (enable_rotation) {
glUniform1f(rotation_time_location, elapsed.count());
} else {
glUniform1f(rotation_time_location, 0.0);
if (!last_rotation_enabled) {
rotation_pause_offset = elapsed.count() - rotation_time;
}
rotation_time = elapsed.count() - rotation_pause_offset;
}
glUniform1f(rotation_time_location, rotation_time);
last_rotation_enabled = enable_rotation;
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glUseProgram(0);
}
@ -185,6 +192,9 @@ private:
GLuint rotation_time_location = 0;
std::chrono::time_point<std::chrono::steady_clock> start_time =
std::chrono::steady_clock::now();
double rotation_time = 0.0;
bool last_rotation_enabled = true;
double rotation_pause_offset = 0.0;
};
int main()