restructure

7 files changed, 298 insertions, 0 deletions

diff --git a/advanced_lighting/blinn_phong/.blinn_phong.c.swp b/advanced_lighting/blinn_phong/.blinn_phong.c.swp
new file mode 100644
index 0000000..d1ba9b1
--- /dev/null
+++ b/advanced_lighting/blinn_phong/.blinn_phong.c.swp
diff --git a/advanced_lighting/blinn_phong/blinn_phong b/advanced_lighting/blinn_phong/blinn_phong
new file mode 100755
index 0000000..1c89f59
--- /dev/null
+++ b/advanced_lighting/blinn_phong/blinn_phong
diff --git a/advanced_lighting/blinn_phong/blinn_phong.c b/advanced_lighting/blinn_phong/blinn_phong.c
new file mode 100644
index 0000000..88bd294
--- /dev/null
+++ b/advanced_lighting/blinn_phong/blinn_phong.c
@@ -0,0 +1,210 @@
+#include "pwyazh.h"
+
+#include "GL/glew.h"
+#include "GLFW/glfw3.h"
+
+#include "pwyazh_GL.h"
+
+#include "common.h"
+
+static S32 global_width = 1024, global_height = 768;
+static Input global_input;
+static V3F camera_dp = (V3F){ 0.0f, 0.0f, 0.0f };
+
+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_E: {
+                    global_input.move_up.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_Q: {
+                    global_input.move_down.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_SPACE: {
+                    global_input.jump.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_RIGHT: {
+                    global_input.action_right.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_LEFT: {
+                    global_input.action_left.state = KeyState_PRESS;
+                } break;
+                case GLFW_KEY_ESCAPE: {
+                    global_input.exit.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_E: {
+                    global_input.move_up.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_Q: {
+                    global_input.move_down.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_SPACE: {
+                    global_input.jump.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_RIGHT: {
+                    global_input.action_right.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_LEFT: {
+                    global_input.action_left.state = KeyState_RELEASE;
+                } break;
+                case GLFW_KEY_ESCAPE: {
+                    global_input.exit.state = KeyState_RELEASE;
+                } break;
+            }
+        } break;
+    }
+}
+
+void
+resize_callback(GLFWwindow* window, int width, int height)
+{
+    global_width = width;
+    global_height = height;
+    glViewport(0, 0, global_width, global_height);
+}
+
+void
+error_callback(int error, const char *desc)
+{
+    fprintf(stderr, "[ERROR] GLFW: %s\n", desc);
+}
+
+void
+update(State *state)
+{
+    V3F camera_dv = get_dv_camera_orbital(&global_input, state->camera.pos,
+                                          v3f_zero(), state->dt, 2.0f);
+    camera_dp = v3f_add(camera_dp, camera_dv);
+    camera_dp = v3f_scalef(camera_dp, 0.8f);
+    state->camera.pos = v3f_add(state->camera.pos, camera_dp);
+
+    input_update_last_state(&global_input);
+}
+
+void
+render(State *state, U32 shader, U32 texture)
+{
+    MAT4 projection, view, model;
+
+    glClearColor(0.15f, 0.15f, 0.15f, 1.0f);
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    projection = perspective(state->camera.fovx, (F32)global_width/(F32)global_height,
+                             state->camera.near, state->camera.far);
+    view = look_at(state->camera.pos, v3f_zero(), v3f(0.0f, 1.0f, 0.0f));
+    model = mat4_identity();
+
+    glUseProgram(shader);
+    shader_set_mat4fv(shader, "projection", projection);
+    shader_set_mat4fv(shader, "view", view);
+    shader_set_mat4fv(shader, "model", model);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    mesh_draw(state->mesh);
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glUseProgram(0);
+}
+
+int
+main(void)
+{
+    GLFWwindow *window;
+    Arena *arena;
+    State state;
+    F64 time, last_time;
+    
+    glfwSetErrorCallback(error_callback);
+    
+    if (glfwInit() == GLFW_FALSE)
+        return(1);
+    
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+    glfwWindowHint(GLFW_SAMPLES, 4);
+    window = glfwCreateWindow(global_width, global_height, "Blinn-Phong shading", 0, 0);
+    if (!window)
+        goto error;
+    
+    glfwSetKeyCallback(window, key_callback);
+    glfwSetWindowSizeCallback(window, resize_callback);
+    
+    glfwMakeContextCurrent(window);
+    
+    if (glewInit() != GLEW_OK)
+        goto error;
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_MULTISAMPLE);
+
+    glEnable(GL_CULL_FACE);
+    
+    /* NOTE(pryazha): init */
+    arena = arena_alloc(Megabytes(64));
+    
+    state.camera = (Camera) {v3f(0.0f, 0.0f, 3.0f), 90.0f, 0.1f, 1000.0f };
+
+    U32 blinn_phong_shader = create_shader_program("shaders/blinn_phong.vs",
+                                                   "shaders/blinn_phong.fs");
+    U32 mesh_texture_diffuse = load_texture("../../data/textures/oak_veneer_01_diff_4k.jpg");
+    state.mesh = mesh_load_obj(arena, "../../data/models/cube.obj");
+
+    last_time = glfwGetTime();
+    
+    while (!glfwWindowShouldClose(window))
+    {
+        glfwPollEvents();
+        if (key_first_press(global_input.exit))
+            glfwSetWindowShouldClose(window, GLFW_TRUE);
+        update(&state);
+        render(&state, blinn_phong_shader, mesh_texture_diffuse);
+        glfwSwapBuffers(window);
+
+        time = glfwGetTime();
+        state.dt = time-last_time;
+        last_time = time;
+#if 0
+        fprintf(stdout, "[INFO]: dt: %f\n", state.dt);
+#endif
+    }
+    
+    glfwTerminate();
+    return(0);
+    
+    error:
+    glfwTerminate();
+    return(1);
+}
diff --git a/advanced_lighting/blinn_phong/build.sh b/advanced_lighting/blinn_phong/build.sh
new file mode 100755
index 0000000..21a65b4
--- /dev/null
+++ b/advanced_lighting/blinn_phong/build.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+. ../../config
+TARGET='blinn_phong'
+set -x
+gcc -o $TARGET $CFLAGS $INCLUDE $LFLAGS $TARGET.c $LIBS && ./$TARGET
diff --git a/advanced_lighting/blinn_phong/shaders/.blinn_phong.fs.swp b/advanced_lighting/blinn_phong/shaders/.blinn_phong.fs.swp
new file mode 100644
index 0000000..cfc93b0
--- /dev/null
+++ b/advanced_lighting/blinn_phong/shaders/.blinn_phong.fs.swp
diff --git a/advanced_lighting/blinn_phong/shaders/blinn_phong.fs b/advanced_lighting/blinn_phong/shaders/blinn_phong.fs
new file mode 100644
index 0000000..23e2968
--- /dev/null
+++ b/advanced_lighting/blinn_phong/shaders/blinn_phong.fs
@@ -0,0 +1,62 @@
+#version 330 core
+
+in vec2 tex_coords;
+in vec3 normal;
+in vec3 frag_pos;
+
+out vec4 frag_color;
+
+uniform sampler2D texture_diffuse;
+uniform sampler2D texture_specular;
+
+uniform vec3 light_pos;
+uniform vec3 view_pos;
+
+uniform float ambient_strength;
+uniform float specular_strength;
+uniform float shininess;
+
+vec4
+spotlight(vec3 light_dir, vec3 view_dir)
+{
+    vec3 tex_color_diff = texture(texture_diffuse, tex_coords);
+    float ambient_strength = 0.1f;
+    vec4 ambient = tex_color_diff*ambient_strength;
+    vec4 diffuse = tex_color_diff*dot(-light_dir, )
+    return(color);
+}
+
+vec4
+blinn_phong()
+{
+    // Sample the diffuse color from the texture
+    vec3 diffuse_color = texture(texture_diffuse, tex_coords).rgb;
+
+    // Sample the specular color from the texture (if available)
+    vec3 specular_color = texture(texture_specular, tex_coords).rgb;
+
+    // Ambient lighting
+    vec3 ambient = ambient_strength*diffuse_color;
+
+    // Diffuse lighting
+    vec3 norm = normalize(normal);
+    vec3 light_dir = normalize(light_pos-frag_pos);
+    float diff = max(dot(norm, light_dir), 0.0);
+    vec3 diffuse = diff * diffuse_color;
+
+    // Specular lighting
+    vec3 view_dir = normalize(view_pos-frag_pos);
+    vec3 halfway_dir = normalize(light_dir+view_dir); // Halfway vector
+    float spec = pow(max(dot(norm, halfway_dir), 0.0), shininess);
+    vec3 specular = specular_strength*spec*specular_color;
+
+    // Combine all components
+    vec3 result = (ambient+diffuse+specular);
+    return((result, 1.0));
+}
+
+void
+main(void)
+{
+    frag_color = blinn_phong();
+}
diff --git a/advanced_lighting/blinn_phong/shaders/blinn_phong.vs b/advanced_lighting/blinn_phong/shaders/blinn_phong.vs
new file mode 100644
index 0000000..d4e5dbc
--- /dev/null
+++ b/advanced_lighting/blinn_phong/shaders/blinn_phong.vs
@@ -0,0 +1,21 @@
+#version 330 core
+layout(location = 0) in vec3 apos;
+layout(location = 1) in vec3 anormal;
+layout(location = 2) in vec2 atex_coords;
+
+out vec3 frag_pos;
+out vec3 normal;
+out vec2 tex_coords;
+
+uniform mat4 projection;
+uniform mat4 view;
+uniform mat4 model;
+
+void
+main(void)
+{
+    frag_pos = vec3(model*vec4(apos, 1.0f);
+    normal = mat3(transpose(inverse(view*model)))*anormal;
+    tex_coords = atex_coords;
+    gl_Position = projection*view*model*vec4(apos, 1.0f);
+}