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package net.tylermurphy.Minecraft.UI.Text;
import java.util.ArrayList;
import java.util.List;
import net.tylermurphy.Minecraft.UI.UIText;
public class TextMeshCreator {
protected static final double LINE_HEIGHT = 0.03f;
protected static final int SPACE_ASCII = 32;
private MetaFile metaData;
public TextMeshCreator(String metaFile) {
metaData = new MetaFile(metaFile);
}
public TextMeshData createTextMesh(UIText text) {
List<Line> lines = createStructure(text);
TextMeshData data = createQuadVertices(text, lines);
return data;
}
private List<Line> createStructure(UIText text) {
char[] chars = text.getTextString().toCharArray();
List<Line> lines = new ArrayList<Line>();
Line currentLine = new Line(metaData.getSpaceWidth(), text.getFontSize(), text.getMaxLineSize());
Word currentWord = new Word(text.getFontSize());
for (char c : chars) {
int ascii = (int) c;
if (ascii == SPACE_ASCII) {
boolean added = currentLine.attemptToAddWord(currentWord);
if (!added) {
lines.add(currentLine);
currentLine = new Line(metaData.getSpaceWidth(), text.getFontSize(), text.getMaxLineSize());
currentLine.attemptToAddWord(currentWord);
}
currentWord = new Word(text.getFontSize());
continue;
}
Character character = metaData.getCharacter(ascii);
currentWord.addCharacter(character);
}
completeStructure(lines, currentLine, currentWord, text);
return lines;
}
private void completeStructure(List<Line> lines, Line currentLine, Word currentWord, UIText text) {
boolean added = currentLine.attemptToAddWord(currentWord);
if (!added) {
lines.add(currentLine);
currentLine = new Line(metaData.getSpaceWidth(), text.getFontSize(), text.getMaxLineSize());
currentLine.attemptToAddWord(currentWord);
}
lines.add(currentLine);
}
private TextMeshData createQuadVertices(UIText text, List<Line> lines) {
text.setNumberOfLines(lines.size());
double curserX = 0f;
double curserY = 0f;
double maxX = 0;
List<Float> vertices = new ArrayList<Float>();
List<Float> textureCoords = new ArrayList<Float>();
for (Line line : lines) {
if (text.isCentered()) {
curserX = (line.getMaxLength() - line.getLineLength()) / 2;
}
for (Word word : line.getWords()) {
for (Character letter : word.getCharacters()) {
double newMaxX = addVerticesForCharacter(curserX, curserY, letter, text.getFontSize(), vertices);
maxX = Math.max(newMaxX, maxX);
addTexCoords(textureCoords, letter.getxTextureCoord(), letter.getyTextureCoord(),
letter.getXMaxTextureCoord(), letter.getYMaxTextureCoord());
curserX += letter.getxAdvance() * text.getFontSize();
}
curserX += metaData.getSpaceWidth() * text.getFontSize();
}
curserX = 0;
curserY += LINE_HEIGHT * text.getFontSize();
}
text.setMaxX(maxX);
return new TextMeshData(listToArray(vertices), listToArray(textureCoords));
}
private double addVerticesForCharacter(double curserX, double curserY, Character character, double fontSize,
List<Float> vertices) {
double x = curserX + (character.getxOffset() * fontSize);
double y = curserY + (character.getyOffset() * fontSize);
double maxX = x + (character.getSizeX() * fontSize);
double maxY = y + (character.getSizeY() * fontSize);
double properX = (2 * x) - 1;
double properY = (-2 * y) + 1;
double properMaxX = (2 * maxX) - 1;
double properMaxY = (-2 * maxY) + 1;
addVertices(vertices, properX, properY, properMaxX, properMaxY);
return maxX;
}
private static void addVertices(List<Float> vertices, double x, double y, double maxX, double maxY) {
vertices.add((float) x);
vertices.add((float) y);
vertices.add((float) x);
vertices.add((float) maxY);
vertices.add((float) maxX);
vertices.add((float) maxY);
vertices.add((float) maxX);
vertices.add((float) maxY);
vertices.add((float) maxX);
vertices.add((float) y);
vertices.add((float) x);
vertices.add((float) y);
}
private static void addTexCoords(List<Float> texCoords, double x, double y, double maxX, double maxY) {
texCoords.add((float) x);
texCoords.add((float) y);
texCoords.add((float) x);
texCoords.add((float) maxY);
texCoords.add((float) maxX);
texCoords.add((float) maxY);
texCoords.add((float) maxX);
texCoords.add((float) maxY);
texCoords.add((float) maxX);
texCoords.add((float) y);
texCoords.add((float) x);
texCoords.add((float) y);
}
private static float[] listToArray(List<Float> listOfFloats) {
float[] array = new float[listOfFloats.size()];
for (int i = 0; i < array.length; i++) {
array[i] = listOfFloats.get(i);
}
return array;
}
}
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