Merge branch 'texture' into 'master'

textures

See merge request lukas/blockgame!1

CMakeLists.txt

@@ -24,10 +24,12 @@ SET(srcs main.cpp gl/Shader.cpp gl/Shader.h
         gl/VertexArray.cpp gl/VertexArray.h
         gl/Renderer.cpp gl/Renderer.h
         blocks/BaseBlock.cpp blocks/BaseBlock.h
-        blocks/GrasBlock.cpp blocks/GrasBlock.h
+        blocks/DirtBlock.cpp blocks/DirtBlock.h
         blocks/BlockRenderer.cpp blocks/BlockRenderer.h
         blocks/RenderBase.cpp blocks/RenderBase.h
-        gl/Camera.cpp gl/Camera.h)
+        gl/Camera.cpp gl/Camera.h
+        bmploader.cpp bmploader.h
+        gl/Texture.cpp gl/Texture.h blocks/TextureLoader.cpp blocks/TextureLoader.h blocks/Stoneblock.cpp blocks/Stoneblock.h crosshair/CrossHair.cpp crosshair/CrossHair.h blocks/AirBlock.h)
 
 add_executable(opengltest ${srcs})
 

blocks/AirBlock.h

@@ -0,0 +1,18 @@
+//
+// Created by lukas on 08.02.22.
+//
+
+#ifndef OPENGLTEST_AIRBLOCK_H
+#define OPENGLTEST_AIRBLOCK_H
+
+#include "BaseBlock.h"
+
+class AirBlock : public BaseBlock{
+public:
+    AirBlock(uint xpos, uint ypos, uint zpos) : BaseBlock(xpos, ypos, zpos, nullptr) {}
+
+    void render() override {
+    }
+};
+
+#endif //OPENGLTEST_AIRBLOCK_H

blocks/BaseBlock.cpp

@@ -2,9 +2,6 @@
 // Created by lukas on 04.02.22.
 //
 
-#define GL_GLEXT_PROTOTYPES
-
-#include <GL/gl.h>
 #include <cstdlib>
 #include <glm/ext/matrix_float4x4.hpp>
 #include <glm/ext/matrix_transform.hpp>
@@ -12,16 +9,16 @@
 #include "BlockRenderer.h"
 
 void BaseBlock::render() {
-    glUniform3f(BlockRenderer::getInstance()->getUniformhandle("u_color"), r, g, b);
+    BlockRenderer::getInstance()->s.Bind();
 
     glm::mat4 position = glm::translate(glm::mat4(1.0f), glm::vec3((float) xpos * 2, (float) ypos * 2, (float) zpos * 2));
     glUniformMatrix4fv(BlockRenderer::getInstance()->getUniformhandle("translation"), 1, GL_FALSE, &position[0][0]);
 
+    texture->Bind();
+
     BlockRenderer::getInstance()->render();
 }
 
-BaseBlock::BaseBlock(float r, float g, float b, uint xpos, uint ypos, uint zpos) : r(r), g(g), b(b), xpos(xpos), ypos(ypos), zpos(zpos) {
-    //    BlockRenderer::init();
-    //    this->getrenderer().init();
+BaseBlock::BaseBlock(uint xpos, uint ypos, uint zpos, Texture *texture): xpos(xpos), ypos(ypos), zpos(zpos), texture(texture) {
 
 }

blocks/BaseBlock.h

@@ -7,16 +7,19 @@
 
 
 #include "BlockRenderer.h"
+#include "../gl/Texture.h"
+#include <glm/ext/matrix_float4x4.hpp>
+#include <glm/ext/matrix_transform.hpp>
 
 class BaseBlock {
 private:
 
-    float r,g,b;
-    uint xpos,ypos,zpos;
+    Texture *texture;
+    uint xpos, ypos, zpos;
 public:
-    BaseBlock(float r, float g, float b, uint xpos, uint ypos, uint zpos);
+    BaseBlock(uint xpos, uint ypos, uint zpos, Texture *texture);
 
-    void render();
+    virtual void render();
 };
 
 

blocks/BlockRenderer.cpp

@@ -3,68 +3,87 @@
 //
 
 #include "BlockRenderer.h"
+#include "../gl/Texture.h"
 
 #define GL_GLEXT_PROTOTYPES
 
 #include <GL/gl.h>
 
 VertexArray *BlockRenderer::setVertexArray() {
-    float cube_vertices[] = {
-            // front
-            -1.0, -1.0, 1.0,
-            1.0, -1.0, 1.0,
-            1.0, 1.0, 1.0,
-            -1.0, 1.0, 1.0,
-            // back
-            -1.0, -1.0, -1.0,
-            1.0, -1.0, -1.0,
-            1.0, 1.0, -1.0,
-            -1.0, 1.0, -1.0
-    };
+    float cubee[] = {
+            // face #1
+            1, 1, 1, 1, 0,
+            -1, 1, 1, 1, 1,
+            -1, -1, 1, 0, 1,
+            1, -1, 1, 0, 0,
 
-    GLfloat cube_colors[] = {
-            // front colors
-            1.0, 0.0, 0.0,
-            0.0, 1.0, 0.0,
-            0.0, 0.0, 1.0,
-            1.0, 1.0, 1.0,
-            // back colors
-            1.0, 0.0, 0.0,
-            0.0, 1.0, 0.0,
-            0.0, 0.0, 1.0,
-            1.0, 1.0, 1.0
-    };
+            // face #2
+            1, 1, 1, 1, 0,
+            1, -1, 1, 1, 1,
+            1, -1, -1, 0, 1,
+            1, 1, -1, 0, 0,
+
+            // face #3
+            1, 1, 1, 1, 0,
+            1, 1, -1, 1, 1,
+            -1, 1, -1, 0, 1,
+            -1, 1, 1, 0, 0,
+
+            // face #4
+            -1, -1, -1, 1, 0,
+            -1, 1, -1, 1, 1,
+            1, 1, -1, 0, 1,
+            1, -1, -1, 0, 0,
+
+            // face #5
+            -1, -1, -1, 1, 0,
+            -1, -1, 1, 1, 1,
+            -1, 1, 1, 0, 1,
+            -1, 1, -1, 0, 0,
+
+            // face #6
+            -1, -1, -1, 1, 0,
+            1, -1, -1, 1, 1,
+            1, -1, 1, 0, 1,
+            -1, -1, 1, 0, 0,};
 
     // Generate a vertex buffer
-    auto *vb = new VertexBuffer(cube_vertices, sizeof(cube_vertices));
+    auto *vb = new VertexBuffer(cubee, sizeof(cubee));
+    auto *va = new VertexArray(*vb);
+    va->add(0,3,5,0);
+    va->add(1,2,5,12);
 
-    //
-    return new VertexArray(*vb);
+    return va;
 }
 
 IndexBuffer *BlockRenderer::setIndexBuffer() {
-    unsigned cube_elements[] = {
-            // front
+    unsigned indexx[] = {
             0, 1, 2,
             2, 3, 0,
-            // right
-            1, 5, 6,
-            6, 2, 1,
-            // back
-            7, 6, 5,
-            5, 4, 7,
-            // left
-            4, 0, 3,
-            3, 7, 4,
-            // bottom
-            4, 5, 1,
-            1, 0, 4,
-            // top
-            3, 2, 6,
-            6, 7, 3
+
+            4, 5, 6,
+            6, 7, 4,
+
+            8, 9, 10,
+            10, 11, 8,
+
+            12, 13, 14,
+            14, 15, 12,
+
+            16, 17, 18,
+            18, 19, 16,
+
+            20, 21, 22,
+            22, 23, 20,
+
+            24, 25, 26,
+            26, 27, 24,
+
+            28, 29, 30,
+            30, 31, 28
     };
 
-    return new IndexBuffer(cube_elements, 36);;
+    return new IndexBuffer(indexx, 48);
 }
 
 Shader BlockRenderer::setShader() {
@@ -83,6 +102,7 @@ Shader BlockRenderer::setShader() {
     Shader s;
     s.loadShader(vertsrc, geosrc, fragsrc);
     s.Bind();
+
     return s;
 }
 

blocks/DirtBlock.cpp

@@ -0,0 +1,9 @@
+//
+// Created by lukas on 04.02.22.
+//
+
+#include "DirtBlock.h"
+#include "TextureLoader.h"
+
+DirtBlock::DirtBlock(const uint &xpos, const uint &ypos, const uint &zpos) : BaseBlock(xpos, ypos, zpos, TextureLoader::loadTexture("../assets/blocks/dirt.bmp")) {
+}

blocks/DirtBlock.h

@@ -0,0 +1,18 @@
+//
+// Created by lukas on 04.02.22.
+//
+
+#ifndef OPENGLTEST_DIRTBLOCK_H
+#define OPENGLTEST_DIRTBLOCK_H
+
+
+#include <cstdlib>
+#include "BaseBlock.h"
+
+class DirtBlock : public BaseBlock {
+public:
+    DirtBlock(const uint &xpos, const uint &ypos, const uint &zpos);
+};
+
+
+#endif //OPENGLTEST_DIRTBLOCK_H

blocks/GrasBlock.cpp

@@ -1,8 +0,0 @@
-//
-// Created by lukas on 04.02.22.
-//
-
-#include "GrasBlock.h"
-
-GrasBlock::GrasBlock(const uint &xpos, const uint &ypos, const uint &zpos) : BaseBlock(0.0f, 1.0f, 0.0f, xpos, ypos, zpos) {
-}

blocks/GrasBlock.h

@@ -1,18 +0,0 @@
-//
-// Created by lukas on 04.02.22.
-//
-
-#ifndef OPENGLTEST_GRASBLOCK_H
-#define OPENGLTEST_GRASBLOCK_H
-
-
-#include <cstdlib>
-#include "BaseBlock.h"
-
-class GrasBlock : public BaseBlock {
-public:
-    GrasBlock(const uint &xpos, const uint &ypos, const uint &zpos);
-};
-
-
-#endif //OPENGLTEST_GRASBLOCK_H

blocks/RenderBase.h

@@ -6,51 +6,63 @@
 #define OPENGLTEST_RENDERBASE_H
 
 
+#include <iostream>
 #include "../gl/Renderer.h"
 #include "../gl/Shader.h"
 
-template <class T>
+template<class T>
 class RenderBase {
-public:
-    virtual VertexArray* setVertexArray() = 0;
-    virtual Shader setShader() = 0;
-    virtual IndexBuffer* setIndexBuffer() = 0;
+private:
+    static RenderBase *instance;
+protected:
+    RenderBase() {
+        if (instance) throw std::logic_error("Instance already exists");
+        instance = this;
+    }
 
-    static RenderBase* getInstance() {
+public:
+    virtual VertexArray *setVertexArray() = 0;
+
+    virtual Shader setShader() = 0;
+
+    virtual IndexBuffer *setIndexBuffer() = 0;
+
+    static RenderBase *getInstance() {
         if (instance == nullptr) {
-            instance = new T();
+            new T();
             instance->init();
         }
         return instance;
-
     }
 
-private:
-    static RenderBase* instance;
-
-
-private:
+public:
     Renderer r;
-    VertexArray* va;
-    IndexBuffer* ib;
+    VertexArray *va;
+    IndexBuffer *ib;
     Shader s;
 
 public:
-    RenderBase(){};
-    void render(){
+
+
+    virtual void render() {
         r.render(*va, *ib, s);
     }
+
     void init() {
         s = setShader();
         va = setVertexArray();
         ib = setIndexBuffer();
     }
-    void deinit(){}
 
-    unsigned getMVPhandle(){
+    void deinit() {
+        glDeleteProgram(s.getHandle());
+    }
+
+    unsigned getMVPhandle() {
         return s.getUniformHandle("MVP");
     }
-    unsigned getUniformhandle(std::string name){
+
+    unsigned getUniformhandle(std::string name) {
         return s.getUniformHandle(std::move(name));
     }
 };

blocks/Stoneblock.cpp

@@ -0,0 +1,8 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#include "Stoneblock.h"
+#include "TextureLoader.h"
+
+Stoneblock::Stoneblock(uint xpos, uint ypos, uint zpos) : BaseBlock(xpos, ypos, zpos, TextureLoader::loadTexture("../assets/blocks/stone.bmp")) {}

blocks/Stoneblock.h

@@ -0,0 +1,17 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#ifndef OPENGLTEST_STONEBLOCK_H
+#define OPENGLTEST_STONEBLOCK_H
+
+
+#include "BaseBlock.h"
+
+class Stoneblock: public BaseBlock {
+public:
+    Stoneblock(uint xpos, uint ypos, uint zpos);
+};
+
+
+#endif //OPENGLTEST_STONEBLOCK_H

blocks/TextureLoader.cpp

@@ -0,0 +1,22 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#include <iostream>
+#include "TextureLoader.h"
+
+std::unordered_map<std::string, Texture> TextureLoader::texts;
+
+Texture *TextureLoader::loadTexture(std::string path) {
+    if (texts.find(path) != texts.end()) {
+        return &texts[path];
+    } else {
+        std::cout << "Loading texture: " << path << std::endl;
+        auto *t = new Texture;
+        t->load(path);
+        t->Bind();
+
+        texts[path] = *t;
+        return t;
+    }
+}

blocks/TextureLoader.h

@@ -0,0 +1,23 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#ifndef OPENGLTEST_TEXTURELOADER_H
+#define OPENGLTEST_TEXTURELOADER_H
+
+
+#include <unordered_map>
+#include "../gl/Texture.h"
+
+class TextureLoader {
+private:
+    static std::unordered_map<std::string, Texture> texts;
+public:
+    static Texture* loadTexture(std::string path);
+
+private:
+
+};
+
+
+#endif //OPENGLTEST_TEXTURELOADER_H

blocks/fragment.shader

@@ -1,9 +1,11 @@
 R"(#version 330 core
 out vec4 color;
 uniform vec3 u_color;
+uniform sampler2D u_texture;
 
 in vec3 normal;
 in vec4 pos;
+in vec2 texcoords;
 
 void main()
 {
@@ -15,6 +17,9 @@ void main()
     // set light color
     vec3 diffuse = diff * vec3(1.0,1.0,1.0);
 
-    vec3 result = (diffuse) * u_color;
+    vec4 c = texture(u_texture, texcoords);
+
+    vec3 result = (diffuse) * c.xyz;
     color = vec4(result,0.0);
+//    color = c;
 })";

blocks/geometry.shader

@@ -4,9 +4,11 @@ layout(triangles) in;
 layout(triangle_strip, max_vertices=3) out;
 
 out vec3 normal;
-
 out vec4 pos;
 
+in vec2 v_texcoords[];
+out vec2 texcoords;
+
 void main( void )
 {
     vec3 a = ( gl_in[1].gl_Position - gl_in[0].gl_Position ).xyz;
@@ -18,6 +20,7 @@ void main( void )
         gl_Position = gl_in[i].gl_Position;
         normal = N;
         pos = gl_in[i].gl_Position;
+        texcoords = v_texcoords[i];
         EmitVertex( );
     }
 

blocks/vertex.shader

@@ -1,16 +1,17 @@
 R"(#version 330 core
 // Input vertex data, different for all executions of this shader.
 layout(location = 0) in vec3 vertexPosition_modelspace;
+layout(location = 1) in vec2 texCoords;
 
 //// Values that stay constant for the whole mesh.
 uniform mat4 MVP;
 uniform mat4 translation;
 
-out vec3 FragPos;
+out vec2 v_texcoords;
 
 void main(){
     // Output position of the vertex, in clip space : MVP * position
     vec4 pos = MVP * translation * vec4(vertexPosition_modelspace,1);
     gl_Position = pos;
-    FragPos = pos.xyz;
+    v_texcoords = texCoords;
 })";

bmploader.cpp

@@ -0,0 +1,76 @@
+//
+// Created by lukas on 05.02.22.
+//
+#define GL_GLEXT_PROTOTYPES
+#include <cstdio>
+#include <GL/gl.h>
+#include <GL/glext.h>
+#include "bmploader.h"
+
+unsigned bmploader::loadBMP(const char *imagepath) {
+    // Data read from the header of the BMP file
+    unsigned char header[54]; // Each BMP file begins by a 54-bytes header
+    unsigned int dataPos;     // Position in the file where the actual data begins
+    int width, height;
+    unsigned int imageSize;   // = width*height*3
+    // Actual RGB data
+    unsigned char * data;
+
+
+    // Open the file
+    FILE * file = fopen(imagepath,"rb");
+    if (!file){printf("Image could not be opened\n"); return 0;}
+
+    if ( fread(header, 1, 54, file)!=54 ){ // If not 54 bytes read : problem
+        printf("Not a correct BMP file\n");
+        return false;
+    }
+
+    if ( header[0]!='B' || header[1]!='M' ){
+        printf("Not a correct BMP file\n");
+        return 0;
+    }
+
+    // Read ints from the byte array
+    dataPos    = *(int*)&(header[0x0A]);
+    imageSize  = *(int*)&(header[0x22]);
+    width      = *(int*)&(header[0x12]);
+    height     = *(int*)&(header[0x16]);
+
+    // Some BMP files are misformatted, guess missing information
+    if (imageSize==0)    imageSize=width*height*3; // 3 : one byte for each Red, Green and Blue component
+    if (dataPos==0)      dataPos=54; // The BMP header is done that way
+
+    // Create a buffer
+    data = new unsigned char [imageSize];
+
+    // Read the actual data from the file into the buffer
+    fread(data,1,imageSize,file);
+
+    //Everything is in memory now, the file can be closed
+    fclose(file);
+
+    glEnable(GL_TEXTURE_2D);
+
+    // Create one OpenGL texture
+    unsigned textureID;
+    glGenTextures(1, &textureID);
+    glActiveTexture(GL_TEXTURE0);
+    // "Bind" the newly created texture : all future texture functions will modify this texture
+    glBindTexture(GL_TEXTURE_2D, textureID);
+
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    // Give the image to OpenGL
+    glTexImage2D(GL_TEXTURE_2D, 0,GL_RGB, width, height, 0, GL_BGR, GL_UNSIGNED_BYTE, data);
+    // Generate mipmaps, by the way.
+    glGenerateMipmap(GL_TEXTURE_2D);
+
+
+
+    return textureID;
+}

bmploader.h

@@ -0,0 +1,15 @@
+//
+// Created by lukas on 05.02.22.
+//
+
+#ifndef OPENGLTEST_BMPLOADER_H
+#define OPENGLTEST_BMPLOADER_H
+
+
+class bmploader {
+public:
+    unsigned loadBMP(const char * imagepath);
+};
+
+
+#endif //OPENGLTEST_BMPLOADER_H

crosshair/CrossHair.cpp

@@ -0,0 +1,50 @@
+//
+// Created by lukas on 06.02.22.
+//
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+#include "CrossHair.h"
+
+VertexArray *CrossHair::setVertexArray() {
+    float fade[] = {
+            // face #1
+            -0.02, -0.05,
+            0.02, 0.02,
+            -0.05, 0.05,
+            };
+
+    // Generate a vertex buffer
+    auto *vb = new VertexBuffer(fade, sizeof(fade));
+    auto *va = new VertexArray(*vb);
+    va->add(0,2,3,0);
+
+    return va;
+}
+
+Shader CrossHair::setShader() {
+    const std::string vertsrc =
+#include "vertex.shader"
+
+    const std::string fragsrc =
+#include "fragment.shader"
+
+    Shader s;
+    s.loadShader(vertsrc, "", fragsrc);
+    s.Bind();
+
+    return s;
+}
+
+IndexBuffer *CrossHair::setIndexBuffer() {
+    unsigned indexx[] = {
+            0,2,1
+    };
+
+    return new IndexBuffer(indexx, 3);
+}
+
+void CrossHair::render() {
+    s.Bind();
+    glUniform3f(getUniformhandle("u_color"), 1.0f, 1.0f, 1.0f);
+    RenderBase::render();
+}

crosshair/CrossHair.h

@@ -0,0 +1,23 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#ifndef OPENGLTEST_CROSSHAIR_H
+#define OPENGLTEST_CROSSHAIR_H
+
+
+#include "../blocks/RenderBase.h"
+
+class CrossHair : public RenderBase<CrossHair> {
+public:
+    VertexArray *setVertexArray() override;
+
+    Shader setShader() override;
+
+    IndexBuffer *setIndexBuffer() override;
+
+    void render() override;
+};
+
+
+#endif //OPENGLTEST_CROSSHAIR_H

crosshair/fragment.shader

@@ -0,0 +1,8 @@
+R"(#version 330 core
+out vec4 color;
+uniform vec3 u_color;
+
+void main()
+{
+    color = vec4(u_color, 0.5);
+})";

crosshair/vertex.shader

@@ -0,0 +1,9 @@
+R"(#version 330 core
+// Input vertex data, different for all executions of this shader.
+layout(location = 0) in vec2 vertexPosition_modelspace;
+
+void main(){
+    // Output position of the vertex, in clip space : MVP * position
+    vec4 pos = vec4(vertexPosition_modelspace,0.0,1.0);
+    gl_Position = pos;
+})";

gl/Camera.cpp

@@ -2,6 +2,7 @@
 // Created by lukas on 05.02.22.
 //
 #define GL_GLEXT_PROTOTYPES
+
 #include <valarray>
 #include <glm/vec3.hpp>
 #include <glm/ext/matrix_transform.hpp>
@@ -68,13 +69,16 @@ void Camera::setWindowSize(double width, double height) {
 
 void Camera::addRotaion(double rotx, double roty) {
     rx -= rotx / 300;
-    ry -= roty / 300;
+    ry += roty / 300;
 
 
     // limit to 2pi
     rx = std::fmod(rx, (2 * M_PI));
     ry = std::fmod(ry, (2 * M_PI));
 
+    ry = fmin(ry, M_PI / 2.0f);
+    ry = fmax(ry, -M_PI / 2.0f);
+
     updateCameraPos();
 }
 
@@ -93,3 +97,15 @@ double Camera::getxangle() const {
 double Camera::getyangle() const {
     return ry;
 }
+
+double Camera::getXpos() {
+    return x;
+}
+
+double Camera::getYpos() {
+    return y;
+}
+
+double Camera::getZpos() {
+    return z;
+}

gl/Camera.h

@@ -19,6 +19,10 @@ public:
     void setPos(double x, double y, double z);
     void addPos(double x, double y, double z);
 
+    double getXpos();
+    double getYpos();
+    double getZpos();
+
     void setRotation(double rotx, double roty);
     void addRotaion(double rotx, double roty);
 

gl/Shader.cpp

@@ -12,6 +12,7 @@
 #include <fstream>
 #include <vector>
 #include <sstream>
+#include <iostream>
 
 unsigned int Shader::compileShader(const char *source, unsigned int type) const {
     unsigned int shaderid = glCreateShader(type);
@@ -46,9 +47,9 @@ unsigned Shader::getHandle() const {
 }
 
 unsigned Shader::getUniformHandle(std::string name) {
-    if(uniformhandles.find(name) != uniformhandles.end()){
+    if (uniformhandles.find(name) != uniformhandles.end()) {
         return uniformhandles[name];
-    }else{
+    } else {
         const unsigned id = glGetUniformLocation(mProgHandle, name.c_str());
         uniformhandles[name] = id;
         return id;
@@ -82,37 +83,56 @@ unsigned int Shader::loadShaderFromFile(const std::string vertex_file_path, cons
 }
 
 unsigned int Shader::loadShader(const std::string vertex_src, const std::string geometry_src, const std::string fragment_src) {
-    // Compile Vertex Shader
-    printf("Compiling vertex shader\n");
-    uint VertexShaderID = compileShader(vertex_src.c_str(), GL_VERTEX_SHADER);
-    if (VertexShaderID == 0) {
-        printf("Error Compiling shader\n");
-        return 0;
+    uint VertexShaderID;
+    uint GeometryShaderID;
+    uint FragmentShaderID;
+
+    if (!vertex_src.empty()) {
+        // Compile Vertex Shader
+        printf("Compiling vertex shader\n");
+        VertexShaderID = compileShader(vertex_src.c_str(), GL_VERTEX_SHADER);
+        if (VertexShaderID == 0) {
+            printf("Error Compiling vertex shader\n");
+            return 0;
+        }
     }
 
-    printf("Compiling geometry shader\n");
-    uint GeometryShaderID = compileShader(geometry_src.c_str(), GL_GEOMETRY_SHADER);
-    if (GeometryShaderID == 0) {
-        printf("Error Compiling shader\n");
-        return 0;
+
+    if (!geometry_src.empty()) {
+        printf("Compiling geometry shader\n");
+        GeometryShaderID = compileShader(geometry_src.c_str(), GL_GEOMETRY_SHADER);
+        if (GeometryShaderID == 0) {
+            printf("Error Compiling shader\n");
+            return 0;
+        }
     }
 
-    printf("Compiling fragment shader\n");
-    uint FragmentShaderID = compileShader(fragment_src.c_str(), GL_FRAGMENT_SHADER);
-    if (FragmentShaderID == 0) {
-        printf("Error Compiling shader\n");
-        return 0;
+    if (!fragment_src.empty()) {
+        printf("Compiling fragment shader\n");
+        FragmentShaderID = compileShader(fragment_src.c_str(), GL_FRAGMENT_SHADER);
+        if (FragmentShaderID == 0) {
+            printf("Error Compiling shader\n");
+            return 0;
+        }
     }
 
+
     // Link the program
     GLint Result = GL_FALSE;
     int InfoLogLength;
 
     printf("Linking shader program\n");
     GLuint ProgramID = glCreateProgram();
-    glAttachShader(ProgramID, VertexShaderID);
-    glAttachShader(ProgramID, GeometryShaderID);
-    glAttachShader(ProgramID, FragmentShaderID);
+    if (!vertex_src.empty()) {
+        glAttachShader(ProgramID, VertexShaderID);
+    }
+    if (!geometry_src.empty()) {
+        glAttachShader(ProgramID, GeometryShaderID);
+    }
+    if (!fragment_src.empty()) {
+        glAttachShader(ProgramID, FragmentShaderID);
+    }
+
     glLinkProgram(ProgramID);
 
     // Check the program
@@ -125,11 +145,20 @@ unsigned int Shader::loadShader(const std::string vertex_src, const std::string
     }
 
     // cleanup shaders
-    glDetachShader(ProgramID, VertexShaderID);
-    glDetachShader(ProgramID, FragmentShaderID);
+    if (!vertex_src.empty()){
+        glDetachShader(ProgramID, VertexShaderID);
+        glDeleteShader(VertexShaderID);
+    }
 
-    glDeleteShader(VertexShaderID);
-    glDeleteShader(FragmentShaderID);
+    if (!geometry_src.empty()){
+        glDetachShader(ProgramID, GeometryShaderID);
+        glDeleteShader(GeometryShaderID);
+    }
+
+    if (!fragment_src.empty()){
+        glDetachShader(ProgramID, FragmentShaderID);
+        glDeleteShader(FragmentShaderID);
+    }
 
     mProgHandle = ProgramID;
     return ProgramID;

gl/Shader.h

@@ -7,6 +7,12 @@
 
 #include <unordered_map>
 #include <string>
+#include <stdexcept>
+#include <glm/ext/matrix_float4x4.hpp>
+#include <iostream>
+#define GL_GLEXT_PROTOTYPES
+
+#include <GL/gl.h>
 
 class Shader {
 private:
@@ -24,22 +30,24 @@ public:
 
     unsigned int loadShader(const std::string vertex_src, const std::string geometry_src, const std::string fragment_src);
 
-    /**
-     * comile a specific shader source
-     * @param source source string
-     * @param type shader tpye
-     * @return id of copiled shader
-     */
-    unsigned int compileShader(const char *source, unsigned int type) const;
+
 
     std::string readFile(std::string path);
 
     void Bind() const;
 
     unsigned getHandle() const;
-
     unsigned getUniformHandle(std::string name);
 
+private:
+    /**
+ * comile a specific shader source
+ * @param source source string
+ * @param type shader tpye
+ * @return id of copiled shader
+ */
+    unsigned int compileShader(const char *source, unsigned int type) const;
+
 };
 
 #endif //OPENGLTEST_SHADER_H

gl/Texture.cpp

@@ -0,0 +1,26 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#include "Texture.h"
+#include "../bmploader.h"
+
+#define GL_GLEXT_PROTOTYPES
+
+#include <GL/gl.h>
+
+Texture::Texture() {
+}
+
+void Texture::Bind() {
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, mTexturehandle);
+}
+
+void Texture::UnBind() {
+    glBindTexture(GL_TEXTURE_2D, 0);
+}
+
+void Texture::load(std::string path) {
+    mTexturehandle = bmploader().loadBMP(path.c_str());
+}

gl/Texture.h

@@ -0,0 +1,22 @@
+//
+// Created by lukas on 06.02.22.
+//
+
+#ifndef OPENGLTEST_TEXTURE_H
+#define OPENGLTEST_TEXTURE_H
+
+
+#include <string>
+
+class Texture {
+private:
+    unsigned mTexturehandle;
+public:
+    Texture();
+    void load(std::string path);
+    void Bind();
+    void UnBind();
+};
+
+
+#endif //OPENGLTEST_TEXTURE_H

gl/VertexArray.cpp

@@ -14,13 +14,22 @@ VertexArray::VertexArray(const VertexBuffer& buff) {
 
     // generate new vertex array object
     glGenVertexArrays(1, &handle);
+
     Bind();
 
-    // specify syntax of my data
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *) nullptr);
-    glEnableVertexAttribArray(0);
+//    // specify syntax of my data
+//    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *) nullptr);
+//    glEnableVertexAttribArray(0);
+//
+//    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *) 12);
+//    glEnableVertexAttribArray(1);
 }
 
 unsigned VertexArray::getHandle() const {
     return handle;
 }
+
+void VertexArray::add(int index, int size, int stride, int pos) {
+    glVertexAttribPointer(index, size, GL_FLOAT, GL_FALSE, stride * sizeof(float), (void *) pos);
+    glEnableVertexAttribArray(index);
+}

gl/VertexArray.h

@@ -17,6 +17,8 @@ public:
 
     void Bind() const;
 
+    void add(int index, int size,  int stride, int pos);
+
     unsigned getHandle() const;
 };
 

main.cpp

@@ -3,19 +3,19 @@
 #define GL_GLEXT_PROTOTYPES
 
 #include <GLFW/glfw3.h>
-#include <GL/gl.h>
 #include <GL/glcorearb.h>
 #include "gl/Shader.h"
 #include "gl/IndexBuffer.h"
 #include "gl/VertexArray.h"
 #include "gl/Renderer.h"
-#include "blocks/GrasBlock.h"
+#include "blocks/DirtBlock.h"
 #include "blocks/BlockRenderer.h"
 #include "gl/Camera.h"
+#include "blocks/Stoneblock.h"
+#include "crosshair/CrossHair.h"
+#include "blocks/AirBlock.h"
 #include <cstdlib>
 
-#include <glm/gtc/matrix_transform.hpp>
-
 //#define WIREFRAME
 
 void framebuffer_size_callback(GLFWwindow *window, int width, int height);
@@ -31,6 +31,7 @@ double oldx = 0;
 double oldy = 0;
 
 bool menuopen = false;
+std::vector<BaseBlock*> blocks;
 
 void cursor_position_callback(GLFWwindow *window, double xpos, double ypos) {
     if (menuopen)return;
@@ -44,6 +45,21 @@ void cursor_position_callback(GLFWwindow *window, double xpos, double ypos) {
     cam.addRotaion(xdiff, ydiff);
 }
 
+void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
+{
+    if(button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS)
+    {
+        double xpos, ypos;
+        cam.getXpos();
+
+        blocks.erase(blocks.begin()+1);
+
+        //getting cursor position
+        glfwGetCursorPos(window, &xpos, &ypos);
+        std::cout << "Cursor Position at (" << xpos << " : " << ypos << std::endl;
+    }
+}
+
 GLFWwindow *initWindow() {
 
     glfwInit();
@@ -74,6 +90,7 @@ GLFWwindow *initWindow() {
 
 
     glfwSetCursorPosCallback(window, cursor_position_callback);
+    glfwSetMouseButtonCallback(window, mouse_button_callback);
 
     if (glfwRawMouseMotionSupported())
         glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE);
@@ -94,24 +111,20 @@ int main() {
 #endif
 
     glEnable(GL_DEPTH_TEST);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
-    GrasBlock gb(0, 0, 0);
-    BaseBlock bb(0.0f, (float) rand() / RAND_MAX, 1.0f, 1, 0, 0);
-
-    //    BlockRenderer::getInstance()->init();
-
-    std::vector<BaseBlock> blocks;
-
-    blocks.push_back(gb);
-    blocks.push_back(bb);
-    blocks.emplace_back(1.0f, .0f, 1.0f, 0, 0, 1);
-
-    for (int i = 0; i < 5; i++) {
-        blocks.push_back(GrasBlock(i, i, 0));
+    for (int x = 0; x < 35; x++) {
+        for (int y = 0; y < 35; ++y) {
+            blocks.push_back(new AirBlock(x,y,2));
+            blocks.push_back(new DirtBlock(x, y, (int)(sin(x / 3.0)*3)+ (int)(cos(y / 2.0)*2))  );
+            blocks.push_back(new Stoneblock(x, y, 0));
+        }
     }
 
-    cam.setPos(0, 0, 0);
-    cam.setRotation(0,0);
+    cam.setPos(0, 0, 3);
+    cam.setRotation(0, 0);
+
+    CrossHair::getInstance()->s.Bind();
 
     while (!glfwWindowShouldClose(window)) {
         // process user input events
@@ -120,17 +133,29 @@ int main() {
         glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
+
+
+//        glUniform3f(CrossHair::getInstance()->getUniformhandle("u_color"), 0.0f, 0.0f, 0.0f);
+        CrossHair::getInstance()->render();
+
+//        CrossHair::getInstance()->s.Bind();
+//        glBindTexture(GL_TEXTURE_2D, 0);
+
         for (auto b: blocks) {
-            b.render();
+            b->render();
         }
 
+
         // swap buffer to calc and show
         glfwSwapBuffers(window);
         // poll for and execute events
         glfwPollEvents();
     }
 
-    //    glDeleteProgram(shaderProgram);
+    for(auto b : blocks){
+        delete b;
+    }
+
     BlockRenderer::getInstance()->deinit();
     glfwTerminate();
     return 0;
@@ -165,11 +190,11 @@ void processInput(GLFWwindow *window) {
         }
 
         if (glfwGetKey(window, GLFW_KEY_SPACE)) {
-            cam.addPos(0.0,0.0,0.1);
+            cam.addPos(0.0, 0.0, 0.1);
         }
 
         if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT)) {
-            cam.addPos(0.0,0.0,-0.1);
+            cam.addPos(0.0, 0.0, -0.1);
         }
     }