added textures to 2D objects

src/main.c

@@ -410,10 +410,13 @@ const char *fragmentShaderSource = "#version 330 core\n"
 
 const char *vertexShaderSourceR = "#version 330 core\n"
     "layout (location = 0) in vec3 aPos;\n"
+    "layout (location = 1) in vec2 aTex;\n"
     "uniform mat4 scale;\n"
     "uniform mat4 slide;\n"
+    "out vec2 texCoord;\n"
     "void main() {\n"
     "   gl_Position = slide * scale * vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+    "   texCoord = aTex;\n"
     "}\0";
 
 const char *fragmentShaderSourceR = "#version 330 core\n"
@@ -422,7 +425,7 @@ const char *fragmentShaderSourceR = "#version 330 core\n"
     "in vec2 texCoord;\n"
     "uniform sampler2D tex0;\n"
     "void main() {\n"
-    "   FragColor = u_color2;\n"
+    "   FragColor = texture(tex0, texCoord) * u_color2;\n"
     "}\0";
 
 typedef enum file_extension {PNG, JPG, JPEG} file_extension;
@@ -459,7 +462,7 @@ void generate_itemTexture_2D(int id, char* filename, file_extension ext) {
     unsigned char* bytes = stbi_load(filename, &widthImg, &heightImg, &numColCh, 0);
     if(bytes == 0) {fprintf(stderr, "ERROR : cannot load texture [%s]\n", filename); exit(1);}
     glGenTextures(1, &itemTexts[id]);
-    glActiveTexture(GL_TEXTURE0);
+    glActiveTexture(GL_TEXTURE1);
     glBindTexture(GL_TEXTURE_2D, itemTexts[id]);
 
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@@ -620,6 +623,7 @@ int main_alt() {
     // 32 max
 
     generate_itemTexture_2D(0, "res/white.png", PNG);
+    generate_itemTexture_2D(1, "res/sq_full.png", PNG);
 
     printf("-----------------------------------------------------------------------------------------------\n"); fflush(stdout);
 
@@ -664,21 +668,26 @@ int main_alt() {
     glDeleteShader(vertexShaderR);
     glDeleteShader(fragmentShaderR);
 
-    // rectangle VAO/VBO
-    initMenus();
-
     unsigned int RVBO, RVAO;
     glGenVertexArrays(1, &RVAO);
     glGenBuffers(1, &RVBO);
     // bind the Vertex Array Object first, then bind and set vertex buffer(s), and then configure vertex attributes(s).
     glBindVertexArray(RVAO);
 
+    // rectangle VAO/VBO
+    initMenus();
+
     glBindBuffer(GL_ARRAY_BUFFER, RVBO);
     glBufferData(GL_ARRAY_BUFFER, sizeof(rectDefault), rectDefault, GL_STATIC_DRAW);
 
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+    // position attribute
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
     glEnableVertexAttribArray(0);
     
+    // texture coord attribute
+    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3*sizeof(float)));
+    glEnableVertexAttribArray(1);
+
     // note that this is allowed, the call to glVertexAttribPointer registered VBO as the vertex attribute's bound vertex buffer object so afterwards we can safely unbind
     glBindBuffer(GL_ARRAY_BUFFER, 0); 
 
@@ -737,9 +746,8 @@ int main_alt() {
         generate_nearby_chunks(render_distance);
         fflush(stdout);
 
-        glUseProgram(shaderProgram);
-
         // draw the map
+        glUseProgram(shaderProgram);
         glBindVertexArray(VAO);
 
         //printf("1\n"); fflush(stdout);
@@ -754,6 +762,7 @@ int main_alt() {
         glUseProgram(shaderProgramR);
         glBindVertexArray(RVAO);
 
+        glActiveTexture(GL_TEXTURE0);
         glBindTexture(GL_TEXTURE_2D, itemTexts[0]);
         gl_drawInteger(shaderProgramR, (int)(1.0f/(real_T)), 0.0f, -0.92f, 0.05, 32, 255, 32, 0.005, -1);
         gl_drawInteger(shaderProgramR, triCount, 0.0f, 0.92f, 0.04f, 128, 128, 128, 0.005f, 1);

src/menus.c

@@ -19,7 +19,7 @@
 #include "maeth.h"
 #include "menus.h"
 
-float rectDefault[18] ;
+float rectDefault[30] ;
 float incr;
 
 int creativeIntID;
@@ -44,13 +44,13 @@ char* modString;
 
 static mat4 scale, slide;
 void initMenus() {
-    rectDefault[0]  = -0.5f; rectDefault[1]  = -0.5f; rectDefault[2]  = -0.99f;
-    rectDefault[3]  = -0.5f; rectDefault[4]  =  0.5f; rectDefault[5]  = -0.99f;
-    rectDefault[6]  =  0.5f; rectDefault[7]  =  0.5f; rectDefault[8]  = -0.99f;
+    rectDefault[0]  = -0.5f; rectDefault[1]  = -0.5f; rectDefault[2]  = -0.99f; rectDefault[3]  = 0.0f; rectDefault[4]  = 1.0f;
+    rectDefault[5]  = -0.5f; rectDefault[6]  =  0.5f; rectDefault[7]  = -0.99f; rectDefault[8]  = 0.0f; rectDefault[9]  = 0.0f;
+    rectDefault[10] =  0.5f; rectDefault[11] =  0.5f; rectDefault[12] = -0.99f; rectDefault[13] = 1.0f; rectDefault[14] = 0.0f;
 
-    rectDefault[9]  = -0.5f; rectDefault[10] = -0.5f; rectDefault[11] = -0.99f;
-    rectDefault[12] =  0.5f; rectDefault[13] =  0.5f; rectDefault[14] = -0.99f;
-    rectDefault[15] =  0.5f; rectDefault[16] = -0.5f; rectDefault[17] = -0.99f;
+    rectDefault[15] = -0.5f; rectDefault[16] = -0.5f; rectDefault[17] = -0.99f; rectDefault[18] = 0.0f; rectDefault[19] = 1.0f;
+    rectDefault[20] =  0.5f; rectDefault[21] =  0.5f; rectDefault[22] = -0.99f; rectDefault[23] = 1.0f; rectDefault[24] = 0.0f;
+    rectDefault[25] =  0.5f; rectDefault[26] = -0.5f; rectDefault[27] = -0.99f; rectDefault[28] = 1.0f; rectDefault[29] = 1.0f;
 
     incr = 0.0f;
 
@@ -512,9 +512,10 @@ void display_button(int but_id, unsigned int fragShader) {
     } else {
         float size = minf(buttonList[but_id].h/2.3f, (buttonList[but_id].w)/(get_string_len(buttonList[but_id].text)));
         int retcol = mn_get_color(buttonList[but_id].red, buttonList[but_id].green, buttonList[but_id].blue);
+        glBindTexture(GL_TEXTURE_2D, itemTexts[1]);
         gl_drawRect(fragShader, buttonList[but_id].x, buttonList[but_id].y, buttonList[but_id].w, buttonList[but_id].h, buttonList[but_id].red, buttonList[but_id].green, buttonList[but_id].blue);
+        glBindTexture(GL_TEXTURE_2D, itemTexts[0]);
         gl_drawString(fragShader, buttonList[but_id].text, buttonList[but_id].x+buttonList[but_id].w/2.0f, buttonList[but_id].y+buttonList[but_id].h/2.0f, 0.7f*size, retcol, retcol, retcol, 0.7f*size/10.0f, 0);
-
     }
 }
 

src/structure.h

@@ -160,7 +160,7 @@ extern int render_distance;
 // ---------------------------------------------------------------------------------------------------- //
 
 extern float vertices[180];
-extern float rectDefault[18];
+extern float rectDefault[30];
 
 extern int triCount;