.gitmodules

@@ -1,3 +0,0 @@
-[submodule "src/vendor/glm"]
-	path = src/vendor/glm
-	url = https://github.com/g-truc/glm

meson.build

@@ -9,9 +9,6 @@ incdir = include_directories(['src', 'src/vendor'])
 
 executable(
     'game',
-    './src/common.cpp',
-    './src/shader.cpp',
-    './src/camera.cpp',
     './src/main.cpp',
     './src/vendor/glad/glad.c',
     include_directories : incdir,

shaders/fragment.glsl

@@ -1,14 +0,0 @@
-#version 330 core
-
-
-in vec2 TexCoord;
-
-out vec4 FragColor;
-
-uniform sampler2D tex;
-
-
-void main()
-{
-    FragColor = texture(tex, TexCoord);
-}

shaders/vertex.glsl

@@ -1,18 +0,0 @@
-#version 330 core
-
-
-layout (location = 0) in vec3 aPos;
-layout (location = 1) in vec2 aTexCoord;
-
-out vec2 TexCoord;
-
-uniform mat4 model;
-uniform mat4 view;
-uniform mat4 projection;
-
-
-void main()
-{
-    gl_Position = projection * view * model * vec4(aPos, 1.0);
-    TexCoord = aTexCoord;
-}

src/camera.cpp

@@ -1,78 +0,0 @@
-#include "camera.hpp"
-
-#include "vendor/glm/glm/mat4x4.hpp"
-#include "vendor/glm/glm/geometric.hpp"
-#include "vendor/glm/glm/gtc/type_ptr.hpp"
-
-
-
-void Camera::process_mouse(double x, double y)
-{
-    bool dirty = last_mouse_x != x || last_mouse_y != y;
-
-    if (!mouse_moved_once) {
-        mouse_moved_once = true;
-        last_mouse_x = x;
-        last_mouse_y = y;
-        dirty = true;
-    }
-
-    if (!dirty) {
-        return;
-    }
-
-    double x_offset = (x - last_mouse_x) * turn_speed;
-    double y_offset = (last_mouse_y - y) * turn_speed;
-    yaw += x_offset;
-    pitch += y_offset;
-
-    if (pitch > 89.0f)
-        pitch = 89.0f;
-    if (pitch < -89.0f)
-        pitch = -89.0f;
-
-    double pitch_factor = cos(glm::radians(pitch));
-    front = (glm::vec3){
-        cos(glm::radians(yaw)) * pitch_factor,
-        sin(glm::radians(pitch)),
-        sin(glm::radians(yaw)) * pitch_factor
-    };
-
-    last_mouse_x = x;
-    last_mouse_y = y;
-
-    view = compute_view();
-}
-
-void Camera::movement(float delta_time, CameraMovement movement)
-{
-    const float factor = movement_speed * delta_time;
-
-    switch (movement) {
-    case MovementUp:
-        position += factor * up;
-        break;
-    case MovementDown:
-        position += factor * down;
-        break;
-    case MovementLeft:
-        position -= factor * glm::normalize(glm::cross(front, up));
-        break;
-    case MovementRight:
-        position += factor * glm::normalize(glm::cross(front, up));
-        break;
-    case MovementBack:
-        position -= factor * front;
-        break;
-    case MovementForward:
-        position += factor * front;
-        break;
-    }
-
-    view = compute_view();
-}
-
-const glm::mat4 Camera::compute_view(void)
-{
-    return glm::lookAt(position, position + front, up);
-}

src/camera.hpp

@@ -1,33 +0,0 @@
-#pragma once
-
-#include "vendor/glm/glm/mat4x4.hpp"
-#include "vendor/glm/glm/vec3.hpp"
-
-
-struct Camera {
-    enum CameraMovement {
-        MovementUp,
-        MovementDown,
-        MovementLeft,
-        MovementRight,
-        MovementBack,
-        MovementForward,
-    };
-
-    double yaw = -90.0f;
-    double pitch = 0.0f;
-    double movement_speed = 2.0f;
-    double turn_speed = 0.1f;
-    double last_mouse_x, last_mouse_y = 0.0f;
-    bool mouse_moved_once = false;
-    glm::vec3 position { 0.0f, 0.0f, 3.0f };
-    glm::vec3 front { 0.0f, 0.0f, -1.0f };
-    glm::vec3 up { 0.0f, 1.0f, 0.0f };
-    glm::vec3 down = { 0.0f, -1.0f, 0.0f };
-    glm::mat4 view { 1.0f };
-
-    void process_mouse(double x, double y);
-    void movement(float delta_time, CameraMovement movement);
-    const glm::mat4 compute_view(void);
-};
-

src/common.cpp

@@ -1,31 +0,0 @@
-#include "common.hpp"
-#include <cstdlib>
-#include <cstdio>
-#include <cerrno>
-
-
-Errno read_entire_file(FILE *f, char **out_data)
-{
-    long saved = ftell(f);
-    if (saved < 0) return errno;
-    if (fseek(f, 0, SEEK_END) < 0) return errno;
-    long size = ftell(f);
-    if (size < 0) return errno;
-    if (fseek(f, saved, SEEK_SET) < 0) return errno;
-
-    char *data = (char*)malloc(size + 1);
-    if (!data) {
-        return errno;
-    }
-
-    fread(data, 1, size, f);
-    if (ferror(f)) {
-        free(data);
-        return errno;
-    }
-
-    data[size] = 0;
-    *out_data = data;
-
-    return 0;
-}

src/common.hpp

@@ -1,8 +0,0 @@
-#pragma once
-
-#include <cstdio>
-
-typedef int Errno;
-
-
-Errno read_entire_file(FILE *f, char **out_data);

src/main.cpp

@@ -1,25 +1,72 @@
 #include <cstdio>
 #include <iostream>
-#include <functional>
-#include "camera.hpp"
-#include "shader.hpp"
 #include "vendor/glad/glad.h"
-#include "vendor/glm/glm/ext/matrix_transform.hpp"
 #define GLFW_INCLUDE_NONE
 #include <GLFW/glfw3.h>
 #define QOI_IMPLEMENTATION
 #include "vendor/qoi.h"
 
-#include "vendor/glm/glm/vec3.hpp"
-#include "vendor/glm/glm/vec4.hpp"
-#include "vendor/glm/glm/trigonometric.hpp"
-#include "vendor/glm/glm/geometric.hpp"
-#include "vendor/glm/glm/mat4x4.hpp"
-#include "vendor/glm/glm/gtc/type_ptr.hpp"
+unsigned int create_shader(unsigned int type, const char **source)
+{
+    unsigned int shader = glCreateShader(type);
+    if (!shader) {
+        printf("err: create_shader: glCreateShader returned 0\n");
+        return 0;
+    }
+    glShaderSource(shader, 1, source, NULL);
+    glCompileShader(shader);
 
+    int success;
+    glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+        char log[512];
+        glGetShaderInfoLog(shader, 512, NULL, log);
+        printf("err: create_shader: compilation failed, log: %s\n", log);
+        return 0;
+    }
 
-std::function<void(int width, int height)> framebuffer_size_callback = nullptr;
-std::function<void(double x, double y)> cursor_position_callback = nullptr;
+    return shader;
+}
+
+unsigned int create_program(const char *vertex_shader_source, const char *fragment_shader_source)
+{
+    unsigned int program = glCreateProgram();
+    if (!program) {
+        printf("err: create_program: glCreateProgram returned 0\n");
+        return 0;
+    }
+
+    unsigned int vertex_shader = create_shader(GL_VERTEX_SHADER, &vertex_shader_source);
+    if (!vertex_shader) {
+        printf("err: create_program: create_shader failed returned 0 (vertex_shader)\n");
+        return 0;
+    }
+    unsigned int fragment_shader = create_shader(GL_FRAGMENT_SHADER, &fragment_shader_source);
+    if (!fragment_shader) {
+        printf("err: create_program: create_shader failed returned 0 (fragment_shader)\n");
+        return 0;
+    }
+
+    glAttachShader(program, vertex_shader);
+    glAttachShader(program, fragment_shader);
+    glLinkProgram(program);
+
+    int success;
+    glGetProgramiv(program, GL_LINK_STATUS, &success);
+    if (!success) {
+        char log[512];
+        glGetProgramInfoLog(program, 512, NULL, log);
+        printf("err: create_program: link failed, log: %s\n", log);
+        return 0;
+    }
+
+    return program;
+}
+
+void framebuffer_size_callback(GLFWwindow *window, int width, int height)
+{
+    glViewport(0, 0, width, height);
+}
 
 int main()
 {
@@ -44,66 +91,42 @@ int main()
     gladLoadGL();
     glfwSwapInterval(1);
 
-    glfwSetFramebufferSizeCallback(window, [](GLFWwindow *_, int width, int height) {
-        if (framebuffer_size_callback) {
-            framebuffer_size_callback(width, height);
-        }
-    });
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
-    glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
-    glfwSetCursorPosCallback(window, [](GLFWwindow *_, double x, double y) {
-        if (cursor_position_callback) {
-            cursor_position_callback(x, y);
-        }
-    });
-
-    glEnable(GL_DEPTH_TEST);
 
     float verts[] = {
-        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-        0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
-        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
-
-        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-        0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-        0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
-        -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
-        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-
-        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-        -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-
-        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-        0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-        0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-        0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-
-        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-        0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
-        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
-        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
-        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
-
-        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
-        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
-        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
-        -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
-        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
+        // position   // color           // texture coords
+        0.0f, 0.5f,   1.0f, 0.0f, 0.0f,  0.5f, 1.0f,
+        -0.5f, -0.5f, 0.0f, 1.0f, 0.0f,  0.0f, 0.0f,
+        0.5f, -0.5f,  0.0f, 0.0f, 1.0f,  1.0f, 0.0f,
     };
 
-    unsigned int program = create_program("shaders/vertex.glsl", "shaders/fragment.glsl");
+    static const char *vertex_shader_source = ""
+        "#version 330 core\n"
+        "layout (location = 0) in vec2 aPos;\n"
+        "layout (location = 1) in vec3 aColor;\n"
+        "layout (location = 2) in vec2 aTexCoord;\n"
+        "out vec3 fragColor;\n"
+        "out vec2 TexCoord;\n"
+        "void main()\n"
+        "{\n"
+        "    gl_Position = vec4(aPos.x, aPos.y, 0.0, 1.0);\n"
+        "    fragColor = aColor;\n"
+        "    TexCoord = aTexCoord;\n"
+        "}\0";
+
+    static const char *fragment_shader_source = ""
+        "#version 330 core\n"
+        "in vec3 fragColor;\n"
+        "in vec2 TexCoord;\n"
+        "out vec4 FragColor;\n"
+        "uniform sampler2D tex;\n"
+        "void main()\n"
+        "{\n"
+        "    FragColor = texture(tex, TexCoord);\n"
+        "}\0";
+
+    unsigned int program = create_program(vertex_shader_source, fragment_shader_source);
 
     unsigned int texture;
     glGenTextures(1, &texture);
@@ -120,68 +143,26 @@ int main()
     glBindBuffer(GL_ARRAY_BUFFER, buffer);
     glBufferData(GL_ARRAY_BUFFER, sizeof(verts), &verts, GL_STATIC_DRAW);
     
-    // position
-    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (const void*)0);
+    // 2D position
+    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 7 * sizeof(float), (const void*)0);
     glEnableVertexAttribArray(0);
 
-    // texture coords
-    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (const void*)(3 * sizeof(float)));
+    // RGB color
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 7 * sizeof(float), (const void*)(2 * sizeof(float)));
     glEnableVertexAttribArray(1);
 
-    glm::mat4 projection = glm::mat4(1.0f);
-    Camera camera;
-
-    framebuffer_size_callback = [&projection, program](int width, int height) {
-        projection = glm::perspective(glm::radians(45.0f), (float)width / (float)height, 0.1f, 100.0f);
-        glUniformMatrix4fv(glGetUniformLocation(program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
-        glViewport(0, 0, width, height);
-    };
-
-    cursor_position_callback = [&camera](double x, double y) {
-        camera.process_mouse(x, y);
-    };
-
-    float delta_time = 0.0f;
-    float last_frame_time = 0.0f;
+    // texture coords
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 7 * sizeof(float), (const void*)(5 * sizeof(float)));
+    glEnableVertexAttribArray(2);
 
     while (!glfwWindowShouldClose(window)) {
-        float current_frame_time = glfwGetTime();
-        delta_time = current_frame_time - last_frame_time;
-        last_frame_time = current_frame_time;
-
-        if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementForward);
-        }
-        if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementBack);
-        }
-        if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementLeft);
-        }
-        if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementRight);
-        }
-        if (glfwGetKey(window, GLFW_KEY_E) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementUp);
-        }
-        if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS) {
-            camera.movement(delta_time, Camera::MovementDown);
-        }
-
         glClearColor(0.5, 0.5, 0.5, 1.0);
-        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        glClear(GL_COLOR_BUFFER_BIT);
 
         glUseProgram(program);
-        glUniformMatrix4fv(glGetUniformLocation(program, "view"), 1, GL_FALSE, glm::value_ptr(camera.view));
-
         glBindTexture(GL_TEXTURE_2D, texture);
         glBindVertexArray(vertex_array);
-
-        for (int i = 0; i < 12; i++) {
-            glm::mat4 model = glm::translate(glm::mat4(1.0), glm::vec3(2 * i, 0.0f, 0.0f));
-            glUniformMatrix4fv(glGetUniformLocation(program, "model"), 1, GL_FALSE, glm::value_ptr(model));
-            glDrawArrays(GL_TRIANGLES, 0, 36);
-        }
+        glDrawArrays(GL_TRIANGLES, 0, 3);
 
         glfwSwapBuffers(window);
         glfwPollEvents();

src/shader.cpp

@@ -1,105 +0,0 @@
-#include "shader.hpp"
-#include "common.hpp"
-#include "vendor/glad/glad.h"
-#include <cstdio>
-#include <cstring>
-#include <cerrno>
-#include <cstdlib>
-
-
-unsigned int create_shader(unsigned int type, const char **source)
-{
-    unsigned int shader = glCreateShader(type);
-    if (!shader) {
-        printf("err: create_shader: glCreateShader returned 0\n");
-        return 0;
-    }
-    glShaderSource(shader, 1, source, NULL);
-    glCompileShader(shader);
-
-    int success;
-    glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
-    if (!success) {
-        char log[512];
-        glGetShaderInfoLog(shader, 512, NULL, log);
-        printf("err: create_shader: compilation failed, log: %s\n", log);
-        return 0;
-    }
-
-    return shader;
-}
-
-unsigned int create_program_source(const char *vertex_shader_source, const char *fragment_shader_source)
-{
-    unsigned int program = glCreateProgram();
-    if (!program) {
-        printf("err: create_program: glCreateProgram returned 0\n");
-        return 0;
-    }
-
-    unsigned int vertex_shader = create_shader(GL_VERTEX_SHADER, &vertex_shader_source);
-    if (!vertex_shader) {
-        printf("err: create_program: create_shader failed returned 0 (vertex_shader)\n");
-        return 0;
-    }
-    unsigned int fragment_shader = create_shader(GL_FRAGMENT_SHADER, &fragment_shader_source);
-    if (!fragment_shader) {
-        printf("err: create_program: create_shader failed returned 0 (fragment_shader)\n");
-        return 0;
-    }
-
-    glAttachShader(program, vertex_shader);
-    glAttachShader(program, fragment_shader);
-    glLinkProgram(program);
-
-    int success;
-    glGetProgramiv(program, GL_LINK_STATUS, &success);
-    if (!success) {
-        char log[512];
-        glGetProgramInfoLog(program, 512, NULL, log);
-        printf("err: create_program: link failed, log: %s\n", log);
-        return 0;
-    }
-
-    return program;
-}
-
-unsigned int create_program(const char *vertex_shader_path, const char *fragment_shader_path)
-{
-    FILE *vertex_shader_file, *fragment_shader_file = NULL;
-    char *vertex_shader_source = NULL;
-    char *fragment_shader_source = NULL;
-    Errno err = 0;
-    unsigned int ret = 0;
-
-    vertex_shader_file = fopen(vertex_shader_path, "r");
-    if (!vertex_shader_file) {
-        fprintf(stderr, "create_program: failed to open vertex shader file (%s): %s\n", vertex_shader_path, strerror(errno));
-        goto done;
-    }
-    err = read_entire_file(vertex_shader_file, &vertex_shader_source);
-    if (err) {
-        fprintf(stderr, "create_program: failed to read vertex shader file (%s): %s\n", vertex_shader_path, strerror(err));
-        goto done;
-    }
-
-    fragment_shader_file = fopen(fragment_shader_path, "r");
-    if (!fragment_shader_file) {
-        fprintf(stderr, "create_program: failed to open fragment shader file (%s): %s\n", fragment_shader_path, strerror(errno));
-        goto done;
-    }
-    err = read_entire_file(fragment_shader_file, &fragment_shader_source);
-    if (err) {
-        fprintf(stderr, "create_program: failed to read fragment shader file (%s): %s\n", fragment_shader_path, strerror(err));
-        goto done;
-    }
-
-    ret = create_program_source(vertex_shader_source, fragment_shader_source);
-
-done:
-    if (vertex_shader_file) fclose(vertex_shader_file);
-    if (fragment_shader_file) fclose(fragment_shader_file);
-    if (vertex_shader_source) free(vertex_shader_source);
-    if (fragment_shader_source) free(fragment_shader_source);
-    return ret;
-}

src/shader.hpp

@@ -1,4 +0,0 @@
-#pragma once
-
-
-unsigned int create_program(const char *vertex_shader_path, const char *fragment_shader_path);

src/vendor/glm

@@ -1 +0,0 @@
-Subproject commit 5c46b9c07008ae65cb81ab79cd677ecc1934b903