// Step button animation
void drawing_button_step_animation(Button *button, int64_t epoch_ms) {
if (!button->ani_done) {
// check timing of animation
if (epoch_ms - button->click_epoch > BUTTON_ANIMATION_DURATION) {
// pretend the last click was exactly the animation duration ago
// this sets the points to exactly the correct places for the new button state
button->click_epoch = epoch_ms - BUTTON_ANIMATION_DURATION;
button->ani_done = true;
}
// loop through the points in the button
for (uint8_t idx = 0; idx < ARRAY_LENGTH(button->right); idx++) {
if (button->playing) {
button->right[idx] = interpolation_gpoint(ButtonPauseR[idx], ButtonPlay[idx],
epoch_ms - button->click_epoch, BUTTON_ANIMATION_DURATION, CurveSinEaseInOut);
button->left[idx] = interpolation_gpoint(ButtonPauseL[idx], ButtonPlay[idx],
epoch_ms - button->click_epoch, BUTTON_ANIMATION_DURATION, CurveSinEaseInOut);
} else {
button->right[idx] = interpolation_gpoint(ButtonPlay[idx], ButtonPauseR[idx],
epoch_ms - button->click_epoch, BUTTON_ANIMATION_DURATION, CurveSinEaseInOut);
button->left[idx] = interpolation_gpoint(ButtonPlay[idx], ButtonPauseL[idx],
epoch_ms - button->click_epoch, BUTTON_ANIMATION_DURATION, CurveSinEaseInOut);
}
}
}
}
// Animates the position of the stick figure skeleton
// between the last position and the current frame
void stick_figure_step_animation(StickFigure *stick_figure, int64_t epoch_ms) {
// get end skeleton frame
SkeletonFrame end_skeleton = skeleton_frame_data[stick_figure->pose][stick_figure->frame];
// step the animation
if (epoch_ms - stick_figure->frame_start >
end_skeleton.ani_duration + end_skeleton.pause_duration) {
// wrap back to first frame
if (++stick_figure->frame >= end_skeleton.frame_count) {
stick_figure->frame = 0;
}
// prep next for next frame
stick_figure->frame_start += end_skeleton.ani_duration + end_skeleton.pause_duration;
memcpy(&stick_figure->old_skeleton, &stick_figure->cur_skeleton, sizeof(SkeletonFrame));
end_skeleton = skeleton_frame_data[stick_figure->pose][stick_figure->frame];
}
// step the skeleton points if in animation stage, else set them to the end point
if (epoch_ms - stick_figure->frame_start <= end_skeleton.ani_duration) {
// must be a better way to do this without using an array for the figure's points
stick_figure->cur_skeleton.head = interpolation_gpoint(stick_figure->old_skeleton.head,
end_skeleton.head, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.chest = interpolation_gpoint(stick_figure->old_skeleton.chest,
end_skeleton.chest, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.elbow_r = interpolation_gpoint(stick_figure->old_skeleton.elbow_r,
end_skeleton.elbow_r, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.hand_r = interpolation_gpoint(stick_figure->old_skeleton.hand_r,
end_skeleton.hand_r, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.elbow_l = interpolation_gpoint(stick_figure->old_skeleton.elbow_l,
end_skeleton.elbow_l, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.hand_l = interpolation_gpoint(stick_figure->old_skeleton.hand_l,
end_skeleton.hand_l, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.waist = interpolation_gpoint(stick_figure->old_skeleton.waist,
end_skeleton.waist, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.knee_r = interpolation_gpoint(stick_figure->old_skeleton.knee_r,
end_skeleton.knee_r, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.foot_r = interpolation_gpoint(stick_figure->old_skeleton.foot_r,
end_skeleton.foot_r, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.knee_l = interpolation_gpoint(stick_figure->old_skeleton.knee_l,
end_skeleton.knee_l, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
stick_figure->cur_skeleton.foot_l = interpolation_gpoint(stick_figure->old_skeleton.foot_l,
end_skeleton.foot_l, (int32_t)(epoch_ms - stick_figure->frame_start),
end_skeleton.ani_duration, end_skeleton.interp_curve);
}
else {
memcpy(&stick_figure->cur_skeleton, &end_skeleton, sizeof(SkeletonFrame));
}
}
