void Text3DOverlay::render(RenderArgs* args) {
if (!_visible) {
return; // do nothing if we're not visible
}
glPushMatrix(); {
glTranslatef(_position.x, _position.y, _position.z);
glm::quat rotation;
if (_isFacingAvatar) {
// rotate about vertical to face the camera
rotation = Application::getInstance()->getCamera()->getRotation();
} else {
rotation = getRotation();
}
glm::vec3 axis = glm::axis(rotation);
glRotatef(glm::degrees(glm::angle(rotation)), axis.x, axis.y, axis.z);
const float MAX_COLOR = 255.0f;
xColor backgroundColor = getBackgroundColor();
glm::vec4 quadColor(backgroundColor.red / MAX_COLOR, backgroundColor.green / MAX_COLOR, backgroundColor.blue / MAX_COLOR,
getBackgroundAlpha());
glm::vec2 dimensions = getDimensions();
glm::vec2 halfDimensions = dimensions * 0.5f;
const float SLIGHTLY_BEHIND = -0.005f;
glm::vec3 topLeft(-halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND);
glm::vec3 bottomRight(halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND);
DependencyManager::get<GeometryCache>()->renderQuad(topLeft, bottomRight, quadColor);
// Same font properties as textSize()
TextRenderer* textRenderer = TextRenderer::getInstance(SANS_FONT_FAMILY, FIXED_FONT_POINT_SIZE);
float maxHeight = (float)textRenderer->computeExtent("Xy").y * LINE_SCALE_RATIO;
float scaleFactor = (maxHeight / FIXED_FONT_SCALING_RATIO) * _lineHeight;
glTranslatef(-(halfDimensions.x - _leftMargin), halfDimensions.y - _topMargin, 0.0f);
glm::vec2 clipMinimum(0.0f, 0.0f);
glm::vec2 clipDimensions((dimensions.x - (_leftMargin + _rightMargin)) / scaleFactor,
(dimensions.y - (_topMargin + _bottomMargin)) / scaleFactor);
glScalef(scaleFactor, -scaleFactor, scaleFactor);
enableClipPlane(GL_CLIP_PLANE0, -1.0f, 0.0f, 0.0f, clipMinimum.x + clipDimensions.x);
enableClipPlane(GL_CLIP_PLANE1, 1.0f, 0.0f, 0.0f, -clipMinimum.x);
enableClipPlane(GL_CLIP_PLANE2, 0.0f, -1.0f, 0.0f, clipMinimum.y + clipDimensions.y);
enableClipPlane(GL_CLIP_PLANE3, 0.0f, 1.0f, 0.0f, -clipMinimum.y);
glm::vec4 textColor = { _color.red / MAX_COLOR, _color.green / MAX_COLOR, _color.blue / MAX_COLOR, getAlpha() };
textRenderer->draw(0, 0, _text, textColor);
glDisable(GL_CLIP_PLANE0);
glDisable(GL_CLIP_PLANE1);
glDisable(GL_CLIP_PLANE2);
glDisable(GL_CLIP_PLANE3);
} glPopMatrix();
}
