diff options
Diffstat (limited to 'advanced_lighting/blinn_phong/blinn_phong.c')
| -rw-r--r-- | advanced_lighting/blinn_phong/blinn_phong.c | 210 |
1 files changed, 210 insertions, 0 deletions
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); +} |