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(); }
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(); glColor4f(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; glBegin(GL_QUADS); glVertex3f(-halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND); glVertex3f(halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND); glVertex3f(halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND); glVertex3f(-halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND); glEnd(); const int FIXED_FONT_SCALING_RATIO = FIXED_FONT_POINT_SIZE * 40.0f; // this is a ratio determined through experimentation // Same font properties as textWidth() TextRenderer* textRenderer = TextRenderer::getInstance(SANS_FONT_FAMILY, FIXED_FONT_POINT_SIZE); float maxHeight = (float)textRenderer->calculateHeight("Xy") * 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, 1.0); 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); glColor3f(_color.red / MAX_COLOR, _color.green / MAX_COLOR, _color.blue / MAX_COLOR); float alpha = getAlpha(); QStringList lines = _text.split("\n"); int lineOffset = maxHeight; foreach(QString thisLine, lines) { textRenderer->draw(0, lineOffset, qPrintable(thisLine), alpha); lineOffset += maxHeight; } glDisable(GL_CLIP_PLANE0); glDisable(GL_CLIP_PLANE1); glDisable(GL_CLIP_PLANE2); glDisable(GL_CLIP_PLANE3); } glPopMatrix();