f o o

res/shaders/texture.frag

@@ -2,9 +2,11 @@
 
 in layout(location = 1) vec2 textureCoordinates;
 
+layout(binding = 0) uniform sampler2D textureSampler;
+
 out vec4 fragColor;
 
 void main()
 {
-    fragColor = vec4(1.0, 0.0, 0.0, 1.0);
+    fragColor = texture(textureSampler, textureCoordinates);
 }

res/shaders/texture.vert

@@ -1,6 +1,6 @@
 #version 430 core
 
-in layout(location = 0) vec2 position;
+in layout(location = 0) vec3 position;
 in layout(location = 2) vec2 textureCoordinates_in;
 
 out layout(location = 1) vec2 textureCoordinates;
@@ -9,6 +9,6 @@ uniform mat4 orthoMatrix;
 
 void main()
 {
-    gl_Position =  vec4(position, 0.0, 1.0);
+    gl_Position =  orthoMatrix * vec4(position.xy, 0.0, 1.0);
     textureCoordinates = textureCoordinates_in;
 }

src/gamelogic.cpp

@@ -1,3 +1,4 @@
+#include "utilities/window.hpp"
 #include <chrono>
 #include <GLFW/glfw3.h>
 #include <glad/glad.h>
@@ -173,7 +174,7 @@ void initGame(GLFWwindow* window, CommandLineOptions gameOptions) {
 
     auto img = loadPNGFile("../res/textures/charmap.png");
     textureNode->textureID = createTextureFromImage(&img);
-    auto textureMesh = generateTextGeometryBuffer("hello world", 39.0 / 29, 0.4);
+    auto textureMesh = generateTextGeometryBuffer("foo", 39.0 / 29, windowWidth);
     textureNode->vertexArrayObjectID = generateBuffer(textureMesh);
     textureNode->VAOIndexCount = textureMesh.indices.size();
     textureNode->nodeType = FLAT_GEOMETRY;
@@ -381,16 +382,17 @@ void renderNode(SceneNode* node) {
     }
 }
 
-void renderTexture(SceneNode *node, glm::mat4 orthoMatrix) {
+void renderTexture(SceneNode *node) {
+    auto orthoMatrix = glm::ortho(0.0f, static_cast<float>(windowWidth), 0.0f, static_cast<float>(windowHeight));
     GLint orthoLoc = textureShader->getUniformFromName("orthoMatrix");
     glUniformMatrix4fv(orthoLoc, 1, GL_FALSE, glm::value_ptr(orthoMatrix));
     if (node->nodeType == FLAT_GEOMETRY) {
-        glBindTexture(GL_TEXTURE_2D, node->textureID);
+        glBindTextureUnit(0, node->textureID);
         glBindVertexArray(node->vertexArrayObjectID);
         glDrawElements(GL_TRIANGLES, node->VAOIndexCount, GL_UNSIGNED_INT, nullptr);
     }
     for (auto* child : node->children) {
-        renderTexture(child, orthoMatrix);
+        renderTexture(child);
     }
 }
 
@@ -399,11 +401,9 @@ void renderFrame(GLFWwindow* window) {
     glfwGetWindowSize(window, &w, &h);
     glViewport(0, 0, w, h);
 
-    glm::mat4 orthoMatrix = glm::ortho(0.0f, static_cast<float>(w), 0.0f, static_cast<float>(h), -1.0f, 1.0f);
-
     shader->activate();
     renderNode(rootNode);
 
     textureShader->activate();
-    renderTexture(rootNode, orthoMatrix);
+    renderTexture(rootNode);
 }

src/utilities/glfont.cpp

@@ -39,8 +39,8 @@ Mesh generateTextGeometryBuffer(std::string text, float characterHeightOverWidth
         auto u = (int)text.at(i) / 128.0f;
         mesh.textureCoordinates[4*i + 0] = {u, 0};
         mesh.textureCoordinates[4*i + 1] = {u + 1/128.0f, 0};
-        mesh.textureCoordinates[4*i + 2] = {u + 1/128.0f, characterHeight/128.0f};
-        mesh.textureCoordinates[4*i + 3] = {u, characterHeight/128.0f};
+        mesh.textureCoordinates[4*i + 2] = {u + 1/128.0f, 1};
+        mesh.textureCoordinates[4*i + 3] = {u, 1};
     }
 
     return mesh;