diff options
Diffstat (limited to 'pbr/1.2.textured/textured.c')
| -rw-r--r-- | pbr/1.2.textured/textured.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/pbr/1.2.textured/textured.c b/pbr/1.2.textured/textured.c new file mode 100644 index 0000000..e8ed096 --- /dev/null +++ b/pbr/1.2.textured/textured.c @@ -0,0 +1,151 @@ +#include "GL/glew.h" +#include "GLFW/glfw3.h" +#include "common.h" + +int main(void) +{ + state_t state = init_state(1600, 800); + + init_glfw(&state); + init_gl(); + + /* meshes */ + Mesh *sphere = mesh_load_obj(state.arena, "../../data/models/sphere.obj"); + Mesh *cube = mesh_load_obj(state.arena, "../../data/models/cube.obj"); + Mesh *quad = mesh_gen_quad(state.arena); + + /* shaders */ + add_shader("pbr.vert", "pbr.frag", 0); + add_shader("hdr.vert", "hdr.frag", 0); + + U32 shader = find_shader("pbr"); + if (!shader) + die("not again"); + glUseProgram(shader); + shader_set_1i(shader, "color_map", 0); + shader_set_1i(shader, "normal_map", 1); + shader_set_1i(shader, "metallic_map", 2); + shader_set_1i(shader, "roughness_map", 3); + shader_set_1i(shader, "ao_map", 4); + glUseProgram(0); + + light_t lights[4] = { + {{-6.0f, 0.0f, 7.0f}, {300.0f, 300.0f, 300.0f}}, + {{-4.0f, 0.0f, 6.0f}, {300.0f, 300.0f, 300.0f}}, + {{ 1.0f, 0.0f, 5.0f}, {300.0f, 300.0f, 300.0f}}, + {{ 3.0f, 0.0f, 8.0f}, {300.0f, 300.0f, 300.0f}}, + }; + + /* textures */ + U32 color_map = load_texture("../../data/textures/pbr/albedo.png"); + U32 normal_map = load_texture("../../data/textures/pbr/normal.png"); + U32 metallic_map = load_texture("../../data/textures/pbr/metallic.png"); + U32 roughness_map = load_texture("../../data/textures/pbr/roughness.png"); + U32 ao_map = load_texture("../../data/textures/pbr/ao.png"); + + /* framebuffers */ + U32 hdr_fbo, hdr_colorbuffer, hdr_rbo; + glGenFramebuffers(1, &hdr_fbo); + glGenTextures(1, &hdr_colorbuffer); + glBindTexture(GL_TEXTURE_2D, hdr_colorbuffer); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, state.width, state.height, 0, GL_RGBA, GL_FLOAT, 0); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glGenRenderbuffers(1, &hdr_rbo); + glBindRenderbuffer(GL_RENDERBUFFER, hdr_rbo); + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, state.width, state.height); + glBindFramebuffer(GL_FRAMEBUFFER, hdr_fbo); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, hdr_colorbuffer, 0); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, hdr_rbo); + if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) + die("failed to create framebuffer"); + glBindRenderbuffer(GL_RENDERBUFFER, 0); + glBindTexture(GL_TEXTURE_2D, 0); + glBindFramebuffer(GL_FRAMEBUFFER, 0); + + F32 time = 0; + + while (!glfwWindowShouldClose(state.window)) { + handle_glfw_events(state.window, &state.input); + F32 dt = lock_framerate(60); + fps_info(dt, 10); + + /* update */ + update_camera_first_person(&state.camera, &state.input, dt, 2.0f); + F32 limit = 4.0f; + for (U32 i = 0; i < (sizeof(lights) / sizeof(lights[0])); i++) + lights[i].position.y = sinf(2.0f * time + i) * limit; + time += dt; + + /* render */ + F32 ar = (F32)state.width / (F32)state.height; + MAT4 projection = camera_persp(state.camera, ar); + MAT4 view = get_view_matrix(&state.camera); + + glClearColor(0.16f, 0.16f, 0.16f, 1.0f); + + glBindFramebuffer(GL_FRAMEBUFFER, hdr_fbo); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + shader = find_shader("pbr"); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, color_map); + glActiveTexture(GL_TEXTURE1); + glBindTexture(GL_TEXTURE_2D, normal_map); + glActiveTexture(GL_TEXTURE2); + glBindTexture(GL_TEXTURE_2D, metallic_map); + glActiveTexture(GL_TEXTURE3); + glBindTexture(GL_TEXTURE_2D, roughness_map); + glActiveTexture(GL_TEXTURE4); + glBindTexture(GL_TEXTURE_2D, ao_map); + + if (!shader) die("wha"); + glUseProgram(shader); + shader_set_mat4fv(shader, "projection", projection); + shader_set_mat4fv(shader, "view", view); + shader_set_3fv(shader, "camera", state.camera.pos); + for (U32 i = 0; i < (sizeof(lights) / sizeof(lights[0])); i++) { + char str[512]; + snprintf(str, 512, "lights[%d].position", i); + shader_set_3fv(shader, str, lights[i].position); + snprintf(str, 512, "lights[%d].color", i); + shader_set_3fv(shader, str, lights[i].color); + } + S32 rows = 7; + S32 cols = 7; + F32 offset = 3.0f; + for (S32 row = 0; row < rows; row++) { + for (S32 col = 0; col < cols; col++) { + V3F pos = {(col - cols / 2.0f) * offset, (row - rows / 2.0f) * offset, 0.0f}; + MAT4 model = mat4_make_translate(pos); + shader_set_mat4fv(shader, "model", model); + mesh_draw(cube); + } + } + + for (U32 i = 0; i < (sizeof(lights) / sizeof(lights[0])); i++) { + MAT4 model = mat4_make_scale(v3f(0.5f, 0.5f, 0.5f)); + model = mat4_translate(model, lights[i].position); + shader_set_mat4fv(shader, "model", model); + mesh_draw(sphere); + } + + glUseProgram(0); + + glBindFramebuffer(GL_FRAMEBUFFER, 0); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + shader = find_shader("hdr"); + if (!shader) die("!"); + glUseProgram(shader); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, hdr_colorbuffer); + shader_set_mat4fv(shader, "model", mat4_identity()); + mesh_draw(quad); + glUseProgram(0); + + glfwSwapBuffers(state.window); + } + + return 0; +} |