66 lines
2.7 KiB
C++
66 lines
2.7 KiB
C++
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#if 1 // Change to 0 to disable this code (must enable ONE user*.cpp only!)
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// This file provides a crude way to "drop in" user code to the eyes,
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// allowing concurrent operations without having to maintain a bunch of
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// special derivatives of the eye code (which is still undergoing a lot
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// of development). Just replace the source code contents of THIS TAB ONLY,
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// compile and upload to board. Shouldn't need to modify other eye code.
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// User globals can go here, recommend declaring as static, e.g.:
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// static int foo = 42;
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// Called once near the end of the setup() function.
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void user_setup(void) {
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}
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// Called periodically during eye animation. This is invoked in the
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// interval before starting drawing on the last eye so it won't exacerbate
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// visible tearing in eye rendering.
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// This function BLOCKS, it does NOT multitask with the eye animation code,
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// and performance here will have a direct impact on overall refresh rates,
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// so keep it simple. Avoid loops (e.g. if animating something like a servo
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// or NeoPixels in response to some trigger) and instead rely on state
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// machines or similar. Additionally, calls to this function are NOT time-
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// constant -- eye rendering time can vary frame to frame, so animation or
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// other over-time operations won't look very good using simple +/-
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// increments, it's better to use millis() or micros() and work
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// algebraically with elapsed times instead.
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void user_loop(void) {
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/*
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Suppose we have a global bool "animating" (meaning something is in
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motion) and global uint32_t's "startTime" (the initial time at which
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something triggered movement) and "transitionTime" (the total time
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over which movement should occur, expressed in microseconds).
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Maybe it's servos, maybe NeoPixels, or something different altogether.
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This function might resemble something like (pseudocode):
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if(!animating) {
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Not in motion, check sensor for trigger...
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if(read some sensor) {
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Motion is triggered! Record startTime, set transition
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to 1.5 seconds and set animating flag:
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startTime = micros();
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transitionTime = 1500000;
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animating = true;
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No motion actually takes place yet, that will begin on
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the next pass through this function.
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}
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} else {
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Currently in motion, ignore trigger and move things instead...
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uint32_t elapsed = millis() - startTime;
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if(elapsed < transitionTime) {
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Part way through motion...how far along?
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float ratio = (float)elapsed / (float)transitionTime;
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Do something here based on ratio, 0.0 = start, 1.0 = end
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} else {
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End of motion reached.
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Take whatever steps here to move into final position (1.0),
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and then clear the "animating" flag:
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animating = false;
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}
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}
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*/
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}
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#endif // 0
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