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source: orxonox.OLD/trunk/src/lib/graphics/text_engine/multi_line_text.cc @ 7568

Last change on this file since 7568 was 7457, checked in by bensch, 19 years ago

orxonox/trunk: Size2D is ok now for the MultiLineText

File size: 4.0 KB
Line 
1/*
2   orxonox - the future of 3D-vertical-scrollers
3
4   Copyright (C) 2004 orx
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2, or (at your option)
9   any later version.
10
11   ### File Specific:
12   main-programmer: Benjamin Grauer
13   co-programmer: ...
14*/
15
16#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_GRAPHICS
17
18#include "multi_line_text.h"
19#include "font.h"
20
21using namespace std;
22
23/**
24 * @brief creates a new Text Element
25 * @param fontFile the Font to render this text in
26 * @param type The renderType to display this font in
27 */
28MultiLineText::MultiLineText(const std::string& fontFile, unsigned int textSize)
29  : Text(fontFile, textSize)
30{
31  this->setClassID(CL_MULTI_LINE_TEXT, "MultiLineText");
32
33  this->lineSpacing = 1.0f;
34  this->setLineWidth(100.0f);
35}
36
37/**
38 * @brief sets the maximum Line width
39 * @param lineWidth the maximum lineWidth.
40 */
41void MultiLineText::setLineWidth(float lineWidth)
42{
43  this->lineWidth = lineWidth;
44  this->setSizeX2D(lineWidth);
45  this->setupTextWidth();
46}
47
48
49/**
50 * @param lineSpacing: the Spacing between the lines
51 */
52void MultiLineText::setLineSpacing(float lineSpacing)
53{
54   this->lineSpacing = lineSpacing;
55   this->setupTextWidth();
56}
57
58
59/**
60 * @brief draws the Text
61 */
62void MultiLineText::draw() const
63{
64  if (unlikely(this->getText().empty()))
65    return;
66  glPushMatrix();
67  // transform for alignment.
68  // TODO make the Stuff with the alignment
69  if (this->getAlignment() == TEXT_ALIGN_RIGHT)
70    glTranslatef(-this->getSizeX2D(), 0, 0);
71  else if (this->getAlignment() == TEXT_ALIGN_CENTER || this->getAlignment() == TEXT_ALIGN_SCREEN_CENTER)
72    glTranslatef(-this->getSizeX2D()/2, 0, 0);
73
74  // drawing this Text.
75  // setting the Blending effects
76  glColor4f(this->getColor().x, this->getColor().y, this->getColor().z, this->getBlending());
77  glEnable(GL_BLEND);
78  glEnable(GL_TEXTURE_2D);
79  glBlendFunc(GL_SRC_ALPHA, GL_ONE);
80  glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, GL_MODULATE );
81
82  glBindTexture(GL_TEXTURE_2D, this->getFont()->getTexture());
83  glTranslatef(this->getAbsCoor2D().x, this->getAbsCoor2D().y, 0);
84  glRotatef(this->getAbsDir2D(), 0, 0, 1);
85
86  Glyph* tmpGlyph;
87  float posX = 0.0f;
88  float posY = 0.0f;
89  unsigned int lineNumber = 0;
90
91  glBegin(GL_QUADS);
92  for (unsigned int i = 0; i < this->getText().size(); ++i)
93  {
94    if (unlikely(!this->lineEnds.empty() && i == this->lineEnds[lineNumber]))
95    {
96      // go to the next Line.
97      ++lineNumber;
98      posX = 0.0f;
99      posY += this->lineSpacing + this->getFont()->getMaxHeight();
100    }
101
102    if(likely((tmpGlyph = this->getFont()->getGlyphArray()[this->getText()[i]]) != NULL))
103    {
104      glTexCoord2f(tmpGlyph->texCoord[1], tmpGlyph->texCoord[2]);
105      glVertex2d(posX+tmpGlyph->maxX*this->getSize(), posY);
106
107      glTexCoord2f(tmpGlyph->texCoord[1], tmpGlyph->texCoord[3]);
108      glVertex2d(posX+tmpGlyph->maxX*this->getSize(), posY + this->getSize());
109
110      glTexCoord2f(tmpGlyph->texCoord[0], tmpGlyph->texCoord[3]);
111      glVertex2d(posX+tmpGlyph->minX*this->getSize(), posY+ this->getSize());
112
113      glTexCoord2f(tmpGlyph->texCoord[0], tmpGlyph->texCoord[2]);
114      glVertex2d(posX+tmpGlyph->minX*this->getSize(), posY);
115
116      posX += tmpGlyph->advance * this->getSize();
117    }
118  }
119  glEnd();
120  glPopMatrix();
121}
122
123/**
124 * @brief setting up the Text-Width if DYNAMIC
125 */
126void MultiLineText::setupTextWidth()
127{
128  this->lineEnds.clear();
129  float width = 0.0f;
130  float maxWidth = this->lineWidth / this->getSize();
131
132  for (unsigned int i = 0; i < this->getText().size(); i++)
133  {
134    if (width > maxWidth || this->getText()[i] == '\n')
135    {
136      this->lineEnds.push_back(i);
137      width = 0.0f;
138    }
139    // Advance the Text.
140    if(this->getFont()->getGlyphArray()[this->getText()[i]] != NULL)
141      width += this->getFont()->getGlyphArray()[this->getText()[i]]->advance;
142  }
143  this->setSizeY2D((this->lineEnds.size()+1) * (this->lineSpacing + this->getFont()->getMaxHeight()));
144}
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