initial commit

8 files changed, 290 insertions, 0 deletions

diff --git a/mesh_loading_test/build.sh b/mesh_loading_test/build.sh
new file mode 100755
index 0000000..23ccbfa
--- /dev/null
+++ b/mesh_loading_test/build.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+. ../config
+TARGET='mesh_loading_test'
+set -x
+gcc -o $TARGET $CFLAGS $INCLUDE $LFLAGS $TARGET.c $LIBS && ./$TARGET
diff --git a/mesh_loading_test/mesh_loading_test b/mesh_loading_test/mesh_loading_test
new file mode 100755
index 0000000..ebb96a5
--- /dev/null
+++ b/mesh_loading_test/mesh_loading_test
diff --git a/mesh_loading_test/mesh_loading_test.c b/mesh_loading_test/mesh_loading_test.c
new file mode 100644
index 0000000..5284dd2
--- /dev/null
+++ b/mesh_loading_test/mesh_loading_test.c
@@ -0,0 +1,187 @@
+#include "GL/glew.h"
+#include "GLFW/glfw3.h"
+
+#include "pwyazh.h"
+
+#include "common.h"
+
+#define WIDTH 1024
+#define HEIGHT 768
+
+static Input global_input;
+
+void
+key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    switch (action)
+    {
+        case GLFW_PRESS: {
+            switch (key)
+            {
+                case GLFW_KEY_D: {
+                    global_input.move_right.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_W: {
+                    global_input.move_forward.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_A: {
+                    global_input.move_left.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_S: {
+                    global_input.move_backward.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_Q: {
+                    global_input.move_down.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_E: {
+                    global_input.move_up.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_SPACE: {
+                    global_input.jump.state = KeyState_PRESS;
+                } break;
+            }
+        } break;
+        
+        case GLFW_RELEASE: {
+            switch (key)
+            {
+                case GLFW_KEY_D: {
+                    global_input.move_right.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_W: {
+                    global_input.move_forward.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_A: {
+                    global_input.move_left.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_S: {
+                    global_input.move_backward.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_Q: {
+                    global_input.move_down.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_E: {
+                    global_input.move_up.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_SPACE: {
+                    global_input.jump.state = KeyState_RELEASE;
+                } break;
+            }
+        } break;
+    }
+}
+
+int
+main(void)
+{
+    GLFWwindow *window;
+    
+    if (glfwInit() == GLFW_FALSE)
+    {
+        fprintf(stderr, "[ERROR] Failed to initialize glfw.\n");
+        return(1);
+    }
+    
+    glfwWindowHint(GLFW_RESIZABLE, 0);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    window = glfwCreateWindow(WIDTH, HEIGHT, "depth testing", 0, 0);
+    if (!window)
+    {
+        fprintf(stderr, "[ERROR] Failed to create window.\n");
+        glfwTerminate();
+        return(1);
+    }
+    
+    glfwMakeContextCurrent(window);
+    glfwSetKeyCallback(window, key_callback);
+    
+    if (glewInit() != GLEW_OK)
+    {
+        fprintf(stderr, "[ERROR] Failed to initialize glew.\n");
+        glfwTerminate();
+        return(1);
+    }
+    
+    U32 shader = create_shader_program("shaders/default.vs", "shaders/default.fs");
+    
+    Arena *arena = arena_alloc(Megabytes(512));
+    
+    Mesh *what_cube_mesh = mesh_load_obj(arena, "what_cube/what_cube.obj");
+    U32 what_cube_texture = load_texture("what_cube/pryazha.jpg");
+    
+    F32 target_fps = 60.0f;
+    F32 target_spf = 1.0f/target_fps;
+    F32 dt = 0.0f;
+    F32 last_time = glfwGetTime();
+    F32 time = last_time;
+    
+    MAT4 projection, view, model;
+    projection = perspective(90.0f, (F32)WIDTH/(F32)HEIGHT, 0.1f, 100.0f);
+    model = mat4_identity();
+    
+    V3F camera_pos = v3f(0.0f, 0.0f, 3.0f);
+    
+    glEnable(GL_DEPTH_TEST);
+    
+    while (!glfwWindowShouldClose(window))
+    {
+        glfwPollEvents();
+        
+        /* NOTE(pryazha): Update */
+        V3F f = v3f_norm(v3f_sub(v3f(0.0f, 0.0f, 0.0f), camera_pos));
+        V3F l = v3f_norm(v3f_cross(v3f(0.0f, 1.0f, 0.0f), f));
+        V3F u = v3f_cross(f, l);
+        
+        V3F dp = v3f_zero();
+        F32 speed = 2.0f;
+        if (key_is_pressed(global_input.move_right))
+            dp = v3f_sub(dp, l);
+        if (key_is_pressed(global_input.move_forward))
+            dp = v3f_add(dp, f);
+        if (key_is_pressed(global_input.move_left))
+            dp = v3f_add(dp, l);
+        if (key_is_pressed(global_input.move_backward))
+            dp = v3f_sub(dp, f);
+        if (key_is_pressed(global_input.move_up))
+            dp = v3f_add(dp, u);
+        if (key_is_pressed(global_input.move_down))
+            dp = v3f_sub(dp, u);
+        
+        camera_pos = v3f_add(camera_pos, v3f_scalef(dp, speed*dt));
+        
+        view = look_at(camera_pos, v3f_zero(), v3f(0.0f, 1.0f, 0.0f));
+        
+        input_update_last_state(&global_input);
+        
+        /* NOTE(pryazha): Render */
+        glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        
+        glUseProgram(shader);
+        shader_set_mat4fv(shader, "projection", projection);
+        shader_set_mat4fv(shader, "view", view);
+        shader_set_mat4fv(shader, "model", model);
+        glBindTexture(GL_TEXTURE_2D, what_cube_texture);
+        mesh_draw(what_cube_mesh);
+        
+        glfwSwapBuffers(window);
+        
+        F32 elapsed = glfwGetTime()-last_time;
+        if (elapsed < target_spf)
+        {
+            U32 sleep_time = (U32)(target_spf-elapsed);
+            if (sleep_time > 0)
+                sleep(sleep_time);
+        }
+        F32 current_time = glfwGetTime();
+        dt = current_time-last_time;
+        time += dt;
+        last_time = current_time;
+    }
+    
+    arena_release(arena);
+    glfwTerminate();
+    return(0);
+}
diff --git a/mesh_loading_test/shaders/default.fs b/mesh_loading_test/shaders/default.fs
new file mode 100644
index 0000000..bdd4b9a
--- /dev/null
+++ b/mesh_loading_test/shaders/default.fs
@@ -0,0 +1,13 @@
+#version 330 core
+
+in vec2 tex_coords;
+
+out vec4 frag_color;
+
+uniform sampler2D texture1;
+
+void
+main(void)
+{
+    frag_color = texture(texture1, tex_coords);
+}
diff --git a/mesh_loading_test/shaders/default.vs b/mesh_loading_test/shaders/default.vs
new file mode 100644
index 0000000..90e883a
--- /dev/null
+++ b/mesh_loading_test/shaders/default.vs
@@ -0,0 +1,16 @@
+#version 330 core
+layout(location = 0) in vec3 apos;
+layout(location = 2) in vec2 atex_coords;
+
+out vec2 tex_coords;
+
+uniform mat4 projection;
+uniform mat4 view;
+uniform mat4 model;
+
+void
+main(void)
+{
+    tex_coords = atex_coords;
+    gl_Position = projection*view*model*vec4(apos, 1.0);
+}
diff --git a/mesh_loading_test/what_cube/pryazha.jpg b/mesh_loading_test/what_cube/pryazha.jpg
new file mode 100644
index 0000000..b735c71
--- /dev/null
+++ b/mesh_loading_test/what_cube/pryazha.jpg
diff --git a/mesh_loading_test/what_cube/what_cube.mtl b/mesh_loading_test/what_cube/what_cube.mtl
new file mode 100644
index 0000000..f3f61c7
--- /dev/null
+++ b/mesh_loading_test/what_cube/what_cube.mtl
@@ -0,0 +1,13 @@
+# Blender 4.3.1 MTL File: 'what_cube.blend'
+# www.blender.org
+
+newmtl Material
+Ns 250.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2
+map_Kd pryazha.jpg
diff --git a/mesh_loading_test/what_cube/what_cube.obj b/mesh_loading_test/what_cube/what_cube.obj
new file mode 100644
index 0000000..b5f8ca0
--- /dev/null
+++ b/mesh_loading_test/what_cube/what_cube.obj
@@ -0,0 +1,56 @@
+# Blender 4.3.1
+# www.blender.org
+mtllib what_cube.mtl
+o Cube
+v 1.000000 1.000000 -1.000000
+v 1.000000 -1.000000 -1.000000
+v 1.000000 1.000000 1.000000
+v 1.000000 -1.000000 1.000000
+v -1.000000 1.000000 -1.000000
+v -1.000000 -1.000000 -1.000000
+v -1.000000 1.000000 1.000000
+v -1.000000 -1.000000 1.000000
+vn -0.0000 1.0000 -0.0000
+vn -0.0000 -0.0000 1.0000
+vn -1.0000 -0.0000 -0.0000
+vn -0.0000 -1.0000 -0.0000
+vn 1.0000 -0.0000 -0.0000
+vn -0.0000 -0.0000 -1.0000
+vt 0.608128 0.885598
+vt 0.382473 0.659943
+vt 0.608128 0.659943
+vt 0.277495 0.579754
+vt 0.051840 0.354100
+vt 0.277495 0.354100
+vt 0.908901 0.910597
+vt 0.837359 0.839055
+vt 0.908901 0.839055
+vt 0.539373 0.275355
+vt 0.313718 0.049700
+vt 0.539373 0.049700
+vt 0.526773 0.576605
+vt 0.301119 0.350950
+vt 0.526773 0.350950
+vt 0.919368 0.575030
+vt 0.693713 0.349375
+vt 0.919368 0.349375
+vt 0.382473 0.885598
+vt 0.051840 0.579755
+vt 0.837359 0.910597
+vt 0.313718 0.275355
+vt 0.301119 0.576605
+vt 0.693713 0.575030
+s 0
+usemtl Material
+f 5/1/1 3/2/1 1/3/1
+f 3/4/2 8/5/2 4/6/2
+f 7/7/3 6/8/3 8/9/3
+f 2/10/4 8/11/4 6/12/4
+f 1/13/5 4/14/5 2/15/5
+f 5/16/6 2/17/6 6/18/6
+f 5/1/1 7/19/1 3/2/1
+f 3/4/2 7/20/2 8/5/2
+f 7/7/3 5/21/3 6/8/3
+f 2/10/4 4/22/4 8/11/4
+f 1/13/5 3/23/5 4/14/5
+f 5/16/6 1/24/6 2/17/6