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Updates to the new osgtext example and fix to the friend usage.

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This commit is contained in:
Robert Osfield
2003-03-04 17:14:42 +00:00
parent 55c25a551b
commit ba9fbd371f
4 changed files with 160 additions and 11 deletions
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165
examples/osgtext/osgtext.cpp
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@@ -16,26 +16,175 @@
#include <osgDB/Registry>
#include <osgProducer/Viewer>
#include <osg/Material>
#include <osg/Geode>
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/MatrixTransform>
#include <osgText/Font>
#include <osgText/Text>
osg::Group* createHUDText()
{
osgText::Font* font = osgText::readFontFile("fonts/arial.ttf");
osg::Geode* geode = new osg::Geode;
osgText::Text* text1 = new osgText::Text;
text1->setCharacterSize(12.0f);
text1->setText("20 GOTO 10");
geode->addDrawable(text1);
float windowHeight = 1024.0f;
float windowWidth = 1280.0f;
float margin = 50.0f;
osg::Vec4 layoutColor(1.0f,1.0f,0.0f,1.0f);
float layoutCharacterSize = 20.0f;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(layoutColor);
text->setCharacterSize(layoutCharacterSize);
text->setPosition(osg::Vec3(margin,windowHeight-margin,0.0f));
// the default layout is left to right, typically used in languages
// originating from europe such as English, French, German, Spanish etc..
text->setLayout(osgText::Text::LEFT_TO_RIGHT);
text->setText("text->setLayout(osgText::Text::LEFT_TO_RIGHT);");
geode->addDrawable(text);
}
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(layoutColor);
text->setCharacterSize(layoutCharacterSize);
text->setPosition(osg::Vec3(windowWidth-margin,windowHeight-margin,0.0f));
// right to left layouts would be used for hebrew or arabic fonts.
text->setLayout(osgText::Text::RIGHT_TO_LEFT);
text->setText("text->setLayout(osgText::Text::RIGHT_TO_LEFT);");
geode->addDrawable(text);
}
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(layoutColor);
text->setPosition(osg::Vec3(margin,windowHeight-margin,0.0f));
text->setCharacterSize(layoutCharacterSize);
// vertical font layout would be used for asian fonts.
text->setLayout(osgText::Text::VERTICAL);
text->setText("text->setLayout(osgText::Text::VERTICAL);");
geode->addDrawable(text);
}
osg::Vec4 fontSizeColor(0.0f,1.0f,1.0f,1.0f);
float fontSizeCharacterSize = 30;
osg::Vec3 cursor = osg::Vec3(margin*2,windowHeight-margin*2,0.0f);
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(fontSizeColor);
text->setCharacterSize(fontSizeCharacterSize);
text->setPosition(cursor);
// use text that uses 10 by 10 texels as a target resolution for fonts.
text->setFontSize(10,10); // blocky but small texture memory usage
text->setText("text->setFontSize(10,10); // blocky but small texture memory usage");
geode->addDrawable(text);
}
cursor.y() -= fontSizeCharacterSize;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(fontSizeColor);
text->setCharacterSize(fontSizeCharacterSize);
text->setPosition(cursor);
// use text that uses 10 by 10 texels as a target resolution for fonts.
text->setFontSize(20,20); // smoother but higher texture memory usage (but still quite low).
text->setText("text->setFontSize(20,20); // smoother but higher texture memory usage (but still quite low).");
geode->addDrawable(text);
}
cursor.y() -= fontSizeCharacterSize;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(fontSizeColor);
text->setCharacterSize(fontSizeCharacterSize);
text->setPosition(cursor);
// use text that uses 10 by 10 texels as a target resolution for fonts.
text->setFontSize(40,40); // even smoother but again higher texture memory usage.
text->setText("text->setFontSize(40,40); // even smoother but again higher texture memory usage.");
geode->addDrawable(text);
}
osg::Vec4 characterSizeColor(1.0f,0.0f,1.0f,1.0f);
cursor.y() -= fontSizeCharacterSize*2.0f;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(characterSizeColor);
text->setFontSize(15,15);
text->setPosition(cursor);
// use text that 15 units high.
text->setCharacterSize(15); // tiny
text->setText("text->setCharacterSize(15.0f); // tiny");
geode->addDrawable(text);
}
cursor.y() -= fontSizeCharacterSize;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(characterSizeColor);
text->setFontSize(30,30);
text->setPosition(cursor);
// use text that uses 10 by 10 texels as a target resolution for fonts.
text->setCharacterSize(30.0f); // tiny
text->setText("text->setCharacterSize(30.0f); // medium size");
geode->addDrawable(text);
}
cursor.y() -= fontSizeCharacterSize;
{
osgText::Text* text = new osgText::Text;
text->setFont(font);
text->setColor(characterSizeColor);
text->setFontSize(40,40);
text->setPosition(cursor);
// use text that uses 10 by 10 texels as a target resolution for fonts.
text->setCharacterSize(40.0f); // tiny
text->setText("text->setCharacterSize(40.0f); // big, but can go much bigger :-)");
geode->addDrawable(text);
}
if (0)
{
osgText::Text* text2 = new osgText::Text;
text2->setPosition(osg::Vec3(0.0f,50.0f,0.0f));
text2->setCharacterSize(12.0f);
@@ -65,7 +214,7 @@ osg::Group* createHUDText()
text5->setDrawMode(osgText::Text::TEXT|osgText::Text::ALIGNMENT|osgText::Text::BOUNDINGBOX);
text5->setText("This is a test of text AVAV/.|<7C>!<21>$%^&*() - fonts/dirtydoz.ttf");
geode->addDrawable(text5);
}
// osgText::Text::TextString string;
// for(int i=0;i<2048;++i)

2
include/osgText/Font
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@@ -69,7 +69,7 @@ public:
virtual bool hasVertical() const = 0;
// make Text a friend to allow it add and remove its entry in the Font's _textList.
friend Text;
friend class Text;
protected:

2
include/osgText/Text
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@@ -184,7 +184,7 @@ public:
// make Font a friend to allow it set the _font to 0 if the font is
// forcefully unloaded.
friend Font;
friend class Font;
protected:

2
src/osgText/Font.cpp
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@@ -215,7 +215,7 @@ void Font::GlyphTexture::addGlyph(Glyph* glyph, int posX, int posY)
// set up the details of where to place glyph's image in the texture.
glyph->setTexture(this);
glyph->setTexturePosition(posX,posY);
glyph->setMinTexCoord(osg::Vec2((float)posX/((float)getTextureWidth()-1.0f),(float)posY/((float)getTextureHeight()-1.0f)));
glyph->setMinTexCoord(osg::Vec2(((float)posX-1.0f)/((float)getTextureWidth()-1.0f),((float)posY-1)/((float)getTextureHeight()-1.0f)));
glyph->setMaxTexCoord(osg::Vec2((float)(posX+glyph->s())/((float)getTextureWidth()-1.0f),(float)(posY+glyph->t())/((float)getTextureHeight()-1.0f)));
}