implemented overlays and text, need depth configuration

text.cpp

@@ -0,0 +1,102 @@
+#include"root.h"
+#include"text.h"
+#include"shader.h"
+#include"texture.h"
+#include"node.h"
+#include<glad.h>
+#include<glfw3.h>
+#include<iostream>
+#include<ft2build.h>
+#include FT_FREETYPE_H
+
+using namespace std;
+
+namespace vb01{
+	Text::Text(string fontPath,string entry){
+		string basePath="/home/dominykas/c++/FSim/text.";
+		shader=new Shader(basePath+"vert",basePath+"frag");
+
+		FT_Library ft;
+		FT_Face face;
+		if(FT_Init_FreeType(&ft))
+			cout<<"Couldn't init Freetype\n";	
+		if(FT_New_Face(ft,fontPath.c_str(),0,&face))
+			cout<<"Could not load font\n";
+
+		FT_Set_Pixel_Sizes(face,0,96);
+
+		glPixelStorei(GL_UNPACK_ALIGNMENT,1);
+
+		for(u32 i=0;i<128;i++){
+			if(FT_Load_Char(face,i,FT_LOAD_RENDER)){
+				cout<<"Could not load glyph\n";
+				continue;
+			}
+			Glyph c;
+			c.ch=i;
+			c.texture=new Texture(face,i);		
+			c.size=Vector2(face->glyph->bitmap.width,face->glyph->bitmap.rows);
+			c.bearing=Vector2(face->glyph->bitmap_left,face->glyph->bitmap_top);
+			c.advance=face->glyph->advance.x;
+			characters.push_back(c);
+		}
+
+		FT_Done_Face(face);
+		FT_Done_FreeType(ft);
+
+		setText(entry);
+	}
+
+	Text::~Text(){}
+
+	void Text::update(){
+		Root *root=Root::getSingleton();
+		int width=root->getWidth(),height=root->getHeight();
+
+		shader->use();
+		shader->setVec4(color,"color");
+		shader->setVec2(Vector2(width,height),"screen");
+
+		Vector3 origin=node->getPosition();
+		for(int i=0;i<entry.length();i++){
+			Glyph ch;
+			bool foundChar=false;
+			for(Glyph c : characters)
+				if(entry.c_str()[i]==c.ch){
+					ch=c;
+					foundChar=true;
+				}
+			if(!foundChar)continue;
+			Vector2 size=ch.size*scale,bearing=ch.bearing;
+			float data[]={
+				origin.x+bearing.x,origin.y-bearing.y,0,1,
+				origin.x+bearing.x+size.x,origin.y-bearing.y,1,1,
+				origin.x+bearing.x+size.x,origin.y-bearing.y+size.y,1,0,
+
+				origin.x+bearing.x+size.x,origin.y-bearing.y+size.y,1,0,
+				origin.x+bearing.x,origin.y-bearing.y+size.y,0,0,
+				origin.x+bearing.x,origin.y-bearing.y,0,1
+			};
+			origin.x+=(ch.advance>>6)*scale;
+			glBindVertexArray(VAO);
+			glBindBuffer(GL_ARRAY_BUFFER,VBO);
+			glBufferSubData(GL_ARRAY_BUFFER,0,sizeof(data),data);
+			ch.texture->select();
+			glDrawArrays(GL_TRIANGLES,0,6);	
+		}
+	}
+
+	void Text::setText(string text){
+		this->entry=text;
+
+		glGenVertexArrays(1,&VAO);
+		glGenBuffers(1,&VBO);
+		glBindVertexArray(VAO);
+		glBindBuffer(GL_ARRAY_BUFFER,VBO);
+		glBufferData(GL_ARRAY_BUFFER,sizeof(float)*6*4,NULL,GL_DYNAMIC_DRAW);
+		glEnableVertexAttribArray(0);
+		glVertexAttribPointer(0,4,GL_FLOAT,GL_FALSE,4*sizeof(float),(void*)0);
+		glBindBuffer(GL_ARRAY_BUFFER,0);
+		glBindVertexArray(0);
+	}
+}