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Change rendering of reticle when in HMD mode

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Properly take the overlay model matrix into account.
Reticle depth is now relative to the eye, not relative to the overlay sphere.
This commit is contained in:
Anthony J. Thibault 2016-06-17 12:10:26 -07:00
parent 4f6d65a961
commit e04d86a75a
1 changed files with 15 additions and 20 deletions
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35
libraries/display-plugins/src/display-plugins/CompositorHelper.cpp
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@ -409,30 +409,25 @@ void CompositorHelper::updateTooltips() {
//}
}
// eyePose and headPosition are in sensor space.
// the resulting matrix should be in view space.
glm::mat4 CompositorHelper::getReticleTransform(const glm::mat4& eyePose, const glm::vec3& headPosition) const {
glm::mat4 result;
if (isHMD()) {
vec3 reticleScale = vec3(Cursor::Manager::instance().getScale() * reticleSize);
auto reticlePosition = getReticlePosition();
auto spherical = overlayToSpherical(reticlePosition);
// The pointer transform relative to the sensor
auto pointerTransform = glm::mat4_cast(quat(vec3(-spherical.y, spherical.x, 0.0f))) * glm::translate(mat4(), vec3(0, 0, -1));
float reticleDepth = getReticleDepth();
if (reticleDepth != 1.0f) {
// Cursor position in UI space
auto cursorPosition = vec3(pointerTransform[3]) / pointerTransform[3].w;
// Ray to the cursor, in UI space
auto cursorRay = glm::normalize(cursorPosition - headPosition) * reticleDepth;
// Move the ray to be relative to the head pose
pointerTransform[3] = vec4(cursorRay + headPosition, 1);
// Scale up the cursor because of distance
reticleScale *= reticleDepth;
vec2 spherical = overlayToSpherical(getReticlePosition());
vec3 overlaySurfacePoint = getPoint(spherical.x, spherical.y); // overlay space
vec3 sensorSurfacePoint = _modelTransform.transform(overlaySurfacePoint); // sensor space
vec3 d = sensorSurfacePoint - headPosition;
vec3 reticlePosition;
if (glm::length(d) >= EPSILON) {
d = glm::normalize(d);
} else {
d = glm::normalize(overlaySurfacePoint);
}
glm::mat4 overlayXfm;
_modelTransform.getMatrix(overlayXfm);
pointerTransform = overlayXfm * pointerTransform;
pointerTransform = glm::inverse(eyePose) * pointerTransform;
result = glm::scale(pointerTransform, reticleScale);
reticlePosition = headPosition + (d * getReticleDepth());
quat reticleOrientation = quat(vec3(-spherical.y, spherical.x, 0.0f));
vec3 reticleScale = vec3(Cursor::Manager::instance().getScale() * reticleSize * getReticleDepth());
return glm::inverse(eyePose) * createMatFromScaleQuatAndPos(reticleScale, reticleOrientation, reticlePosition);
} else {
static const float CURSOR_PIXEL_SIZE = 32.0f;
const auto canvasSize = vec2(toGlm(_renderingWidget->size()));;