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fix for underdamped avatar rotation momentum

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This commit is contained in:
Andrew Meadows 2015-07-23 14:49:15 -07:00
parent fecb0e3675
commit b26f4b0c8d
1 changed files with 26 additions and 14 deletions
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40
interface/src/avatar/MyAvatar.cpp
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@ -54,7 +54,7 @@
using namespace std; using namespace std;
const glm::vec3 DEFAULT_UP_DIRECTION(0.0f, 1.0f, 0.0f); const glm::vec3 DEFAULT_UP_DIRECTION(0.0f, 1.0f, 0.0f);
const float YAW_SPEED = 500.0f; // degrees/sec const float YAW_SPEED = 150.0f; // degrees/sec
const float PITCH_SPEED = 100.0f; // degrees/sec const float PITCH_SPEED = 100.0f; // degrees/sec
const float DEFAULT_REAL_WORLD_FIELD_OF_VIEW_DEGREES = 30.0f; const float DEFAULT_REAL_WORLD_FIELD_OF_VIEW_DEGREES = 30.0f;
@ -1290,22 +1290,34 @@ bool MyAvatar::shouldRenderHead(const RenderArgs* renderArgs) const {
void MyAvatar::updateOrientation(float deltaTime) { void MyAvatar::updateOrientation(float deltaTime) {
// Smoothly rotate body with arrow keys // Smoothly rotate body with arrow keys
_bodyYawDelta -= _driveKeys[ROT_RIGHT] * YAW_SPEED * deltaTime; float driveLeft = _driveKeys[ROT_LEFT] - _driveKeys[ROT_RIGHT];
_bodyYawDelta += _driveKeys[ROT_LEFT] * YAW_SPEED * deltaTime; float targetSpeed = (_driveKeys[ROT_LEFT] - _driveKeys[ROT_RIGHT]) * YAW_SPEED;
getHead()->setBasePitch(getHead()->getBasePitch() + (_driveKeys[ROT_UP] - _driveKeys[ROT_DOWN]) * PITCH_SPEED * deltaTime); if (targetSpeed != 0.0f) {
const float ROTATION_RAMP_TIMESCALE = 0.1f;
float blend = deltaTime / ROTATION_RAMP_TIMESCALE;
if (blend > 1.0f) {
blend = 1.0f;
}
_bodyYawDelta = (1.0f - blend) * _bodyYawDelta + blend * targetSpeed;
} else if (_bodyYawDelta != 0.0f) {
// attenuate body rotation speed
const float ROTATION_DECAY_TIMESCALE = 0.05f;
float attenuation = 1.0f - deltaTime / ROTATION_DECAY_TIMESCALE;
if (attenuation < 0.0f) {
attenuation = 0.0f;
}
_bodyYawDelta *= attenuation;
float MINIMUM_ROTATION_RATE = 2.0f;
if (fabsf(_bodyYawDelta) < MINIMUM_ROTATION_RATE) {
_bodyYawDelta = 0.0f;
}
}
getHead()->setBasePitch(getHead()->getBasePitch() + (_driveKeys[ROT_UP] - _driveKeys[ROT_DOWN]) * PITCH_SPEED * deltaTime);
// update body orientation by movement inputs // update body orientation by movement inputs
setOrientation(getOrientation() * setOrientation(getOrientation() *
glm::quat(glm::radians(glm::vec3(0.0f, _bodyYawDelta, 0.0f) * deltaTime))); glm::quat(glm::radians(glm::vec3(0.0f, _bodyYawDelta * deltaTime, 0.0f))));
// decay body rotation momentum
const float BODY_SPIN_FRICTION = 7.5f;
float bodySpinMomentum = 1.0f - BODY_SPIN_FRICTION * deltaTime;
if (bodySpinMomentum < 0.0f) { bodySpinMomentum = 0.0f; }
_bodyYawDelta *= bodySpinMomentum;
float MINIMUM_ROTATION_RATE = 2.0f;
if (fabs(_bodyYawDelta) < MINIMUM_ROTATION_RATE) { _bodyYawDelta = 0.0f; }
if (qApp->isHMDMode()) { if (qApp->isHMDMode()) {
// these angles will be in radians // these angles will be in radians