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107 lines
4.1 KiB
C++
107 lines
4.1 KiB
C++
//
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// RenderableTextEntityItem.cpp
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// interface/src
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//
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// Created by Brad Hefta-Gaub on 8/6/14.
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// Copyright 2014 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#include <glm/gtx/quaternion.hpp>
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#include <gpu/GPUConfig.h>
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#include <PerfStat.h>
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#include "RenderableTextEntityItem.h"
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#include "ui/TextRenderer.h"
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const int FIXED_FONT_POINT_SIZE = 40;
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const float LINE_SCALE_RATIO = 1.2f;
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EntityItem* RenderableTextEntityItem::factory(const EntityItemID& entityID, const EntityItemProperties& properties) {
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return new RenderableTextEntityItem(entityID, properties);
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}
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void RenderableTextEntityItem::render(RenderArgs* args) {
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PerformanceTimer perfTimer("RenderableTextEntityItem::render");
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assert(getType() == EntityTypes::Text);
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glm::vec3 position = getPositionInMeters();
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glm::vec3 dimensions = getDimensions() * (float)TREE_SCALE;
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glm::vec3 halfDimensions = dimensions / 2.0f;
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glm::quat rotation = getRotation();
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float leftMargin = 0.1f;
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float rightMargin = 0.1f;
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float topMargin = 0.1f;
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float bottomMargin = 0.1f;
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//qDebug() << "RenderableTextEntityItem::render() id:" << getEntityItemID() << "text:" << getText();
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glPushMatrix();
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{
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glTranslatef(position.x, position.y, position.z);
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glm::vec3 axis = glm::axis(rotation);
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glRotatef(glm::degrees(glm::angle(rotation)), axis.x, axis.y, axis.z);
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const float MAX_COLOR = 255.0f;
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xColor backgroundColor = getBackgroundColorX();
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float alpha = 1.0f; //getBackgroundAlpha();
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glColor4f(backgroundColor.red / MAX_COLOR, backgroundColor.green / MAX_COLOR, backgroundColor.blue / MAX_COLOR, alpha);
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const float SLIGHTLY_BEHIND = -0.005f;
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glBegin(GL_QUADS);
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glVertex3f(-halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND);
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glVertex3f(halfDimensions.x, -halfDimensions.y, SLIGHTLY_BEHIND);
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glVertex3f(halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND);
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glVertex3f(-halfDimensions.x, halfDimensions.y, SLIGHTLY_BEHIND);
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glEnd();
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const int FIXED_FONT_SCALING_RATIO = FIXED_FONT_POINT_SIZE * 40.0f; // this is a ratio determined through experimentation
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// Same font properties as textSize()
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TextRenderer* textRenderer = TextRenderer::getInstance(SANS_FONT_FAMILY, FIXED_FONT_POINT_SIZE);
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float maxHeight = (float)textRenderer->calculateHeight("Xy") * LINE_SCALE_RATIO;
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float scaleFactor = (maxHeight / FIXED_FONT_SCALING_RATIO) * _lineHeight;
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glTranslatef(-(halfDimensions.x - leftMargin), halfDimensions.y - topMargin, 0.0f);
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glm::vec2 clipMinimum(0.0f, 0.0f);
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glm::vec2 clipDimensions((dimensions.x - (leftMargin + rightMargin)) / scaleFactor,
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(dimensions.y - (topMargin + bottomMargin)) / scaleFactor);
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glScalef(scaleFactor, -scaleFactor, 1.0);
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enableClipPlane(GL_CLIP_PLANE0, -1.0f, 0.0f, 0.0f, clipMinimum.x + clipDimensions.x);
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enableClipPlane(GL_CLIP_PLANE1, 1.0f, 0.0f, 0.0f, -clipMinimum.x);
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enableClipPlane(GL_CLIP_PLANE2, 0.0f, -1.0f, 0.0f, clipMinimum.y + clipDimensions.y);
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enableClipPlane(GL_CLIP_PLANE3, 0.0f, 1.0f, 0.0f, -clipMinimum.y);
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xColor textColor = getTextColorX();
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glColor3f(textColor.red / MAX_COLOR, textColor.green / MAX_COLOR, textColor.blue / MAX_COLOR);
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QStringList lines = _text.split("\n");
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int lineOffset = maxHeight;
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float textAlpha = 1.0f; // getTextAlpha()
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foreach(QString thisLine, lines) {
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textRenderer->draw(0, lineOffset, qPrintable(thisLine), textAlpha);
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lineOffset += maxHeight;
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}
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glDisable(GL_CLIP_PLANE0);
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glDisable(GL_CLIP_PLANE1);
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glDisable(GL_CLIP_PLANE2);
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glDisable(GL_CLIP_PLANE3);
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}
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glPopMatrix();
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}
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void RenderableTextEntityItem::enableClipPlane(GLenum plane, float x, float y, float z, float w) {
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GLdouble coefficients[] = { x, y, z, w };
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glClipPlane(plane, coefficients);
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glEnable(plane);
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}
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