int32_t main(int32_t argc, char *argv[]) {
if( init_sdl2() ) {
return 1;
}
int width = 1280;
int height = 720;
SDL_Window* window;
sdl2_window("cute3d: " __FILE__, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, &window);
SDL_GLContext* context;
sdl2_glcontext(3, 2, window, &context);
if( init_shader() ) {
return 1;
}
if( init_canvas(width, height) ) {
return 1;
}
canvas_create("global_dynamic_canvas", &global_dynamic_canvas);
canvas_create("global_static_canvas", &global_static_canvas);
struct Vbo vbo = {0};
vbo_create(&vbo);
vbo_add_buffer(&vbo, SHADER_ATTRIBUTE_VERTEX, 3, GL_FLOAT, GL_STATIC_DRAW);
vbo_add_buffer(&vbo, SHADER_ATTRIBUTE_VERTEX_NORMAL, 3, GL_FLOAT, GL_STATIC_DRAW);
vbo_add_buffer(&vbo, SHADER_ATTRIBUTE_VERTEX_COLOR, 4, GL_UNSIGNED_BYTE, GL_STATIC_DRAW);
vbo_add_buffer(&vbo, SHADER_ATTRIBUTE_VERTEX_NORMAL, NORMAL_SIZE, GL_FLOAT, GL_STATIC_DRAW);
struct Ibo ibo = {0};
ibo_create(GL_TRIANGLES, GL_UNSIGNED_INT, GL_STATIC_DRAW, &ibo);
struct SolidTetrahedron hard_tetrahedron = {0};
struct SolidBox hard_cube = {0};
struct SolidSphere16 hard_sphere16 = {0};
struct SolidSphere32 hard_sphere32 = {0};
solid_tetrahedron_create(1.0, (Color){255, 0, 0, 255}, &hard_tetrahedron);
solid_cube_create(0.5, (Color){0, 255, 0, 255}, &hard_cube);
solid_sphere16_create(16, 8, 0.75, (Color){0, 255, 255, 255}, &hard_sphere16);
solid_sphere32_create(32, 16, 0.75, (Color){255, 255, 0, 255}, &hard_sphere32);
solid_optimize((struct Solid*)&hard_tetrahedron);
solid_optimize((struct Solid*)&hard_cube);
solid_optimize((struct Solid*)&hard_sphere16);
solid_optimize((struct Solid*)&hard_sphere32);
struct VboMesh hard_tetrahedron_mesh, hard_box_mesh, hard_cube_mesh, hard_sphere16_mesh, hard_sphere32_mesh;
vbo_mesh_create_from_solid((struct Solid*)&hard_tetrahedron, &vbo, &ibo, &hard_tetrahedron_mesh);
vbo_mesh_create_from_solid((struct Solid*)&hard_cube, &vbo, &ibo, &hard_cube_mesh);
vbo_mesh_create_from_solid((struct Solid*)&hard_sphere16, &vbo, &ibo, &hard_sphere16_mesh);
vbo_mesh_create_from_solid((struct Solid*)&hard_sphere32, &vbo, &ibo, &hard_sphere32_mesh);
struct SolidTetrahedron smooth_tetrahedron = {0};
struct SolidBox smooth_cube = {0};
struct SolidSphere16 smooth_sphere16 = {0};
struct SolidSphere32 smooth_sphere32 = {0};
solid_tetrahedron_create(1.0, (Color){255, 0, 0, 255}, &smooth_tetrahedron);
solid_cube_create(0.5, (Color){0, 255, 0, 255}, &smooth_cube);
solid_sphere16_create(16, 8, 0.75, (Color){0, 255, 255, 255}, &smooth_sphere16);
solid_sphere32_create(32, 16, 0.75, (Color){255, 255, 0, 255}, &smooth_sphere32);
solid_optimize((struct Solid*)&smooth_tetrahedron);
solid_optimize((struct Solid*)&smooth_cube);
solid_optimize((struct Solid*)&smooth_sphere16);
solid_optimize((struct Solid*)&smooth_sphere32);
solid_smooth_normals((struct Solid*)&smooth_tetrahedron, smooth_tetrahedron.normals, smooth_tetrahedron.normals);
solid_smooth_normals((struct Solid*)&smooth_cube, smooth_cube.normals, smooth_cube.normals);
solid_smooth_normals((struct Solid*)&smooth_sphere16, smooth_sphere16.normals, smooth_sphere16.normals);
solid_smooth_normals((struct Solid*)&smooth_sphere32, smooth_sphere32.normals, smooth_sphere32.normals);
struct VboMesh smooth_tetrahedron_mesh, smooth_box_mesh, smooth_cube_mesh, smooth_sphere16_mesh, smooth_sphere32_mesh;
vbo_mesh_create_from_solid((struct Solid*)&smooth_tetrahedron, &vbo, &ibo, &smooth_tetrahedron_mesh);
vbo_mesh_create_from_solid((struct Solid*)&smooth_cube, &vbo, &ibo, &smooth_cube_mesh);
vbo_mesh_create_from_solid((struct Solid*)&smooth_sphere16, &vbo, &ibo, &smooth_sphere16_mesh);
vbo_mesh_create_from_solid((struct Solid*)&smooth_sphere32, &vbo, &ibo, &smooth_sphere32_mesh);
struct Arcball arcball = {0};
arcball_create(width, height, (Vec4f){2.5,17.0,17.0,1.0}, (Vec4f){2.5,0.0,0.0,1.0}, 0.1, 100.0, &arcball);
float circular_motion_angle = 0.0f;
float circular_motion_speed = (2.0f*PI)/30;
float circular_motion_radius = 12.0f;
Vec3f light_position = { circular_motion_radius, 10.0, circular_motion_radius };
Vec3f light_direction = {0};
vec_sub((Vec3f){0.0f, 0.0f, 0.0f}, light_position, light_direction);
vec_normalize(light_direction, light_direction);
Vec3f eye_position = {0};
vec_copy3f(arcball.camera.pivot.position, eye_position);
Color ambiance = {50, 25, 150, 255};
Color specular = {255, 255, 255, 255};
float material_shininess = 1.0;
Vec4f material_coefficients = { 0.8, 0.2, 0.0, 0.0 };
// flat
struct Shader flat_shader = {0};
shader_create(&flat_shader);
shader_attach(&flat_shader, GL_VERTEX_SHADER, "prefix.vert", 1, "flat_shading.vert");
shader_attach(&flat_shader, GL_FRAGMENT_SHADER, "prefix.frag", 1, "flat_shading.frag");
shader_make_program(&flat_shader, SHADER_DEFAULT_NAMES, "flat_shader");
shader_set_uniform_3f(&flat_shader, flat_shader.program, SHADER_UNIFORM_LIGHT_DIRECTION, 3, GL_FLOAT, light_direction);
shader_set_uniform_4f(&flat_shader, flat_shader.program, SHADER_UNIFORM_AMBIENT_LIGHT, 4, GL_UNSIGNED_BYTE, ambiance);
// gouraud
struct Shader gouraud_shader = {0};
shader_create(&gouraud_shader);
shader_attach(&gouraud_shader, GL_VERTEX_SHADER, "prefix.vert", 1, "gouraud_shading.vert");
shader_attach(&gouraud_shader, GL_FRAGMENT_SHADER, "prefix.frag", 1, "gouraud_shading.frag");
shader_make_program(&gouraud_shader, SHADER_DEFAULT_NAMES, "gouraud_shader");
shader_set_uniform_3f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_LIGHT_POSITION, 3, GL_FLOAT, light_position);
shader_set_uniform_3f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_EYE_POSITION, 3, GL_FLOAT, eye_position);
shader_set_uniform_4f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_AMBIENT_LIGHT, 4, GL_UNSIGNED_BYTE, ambiance);
shader_set_uniform_4f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_SPECULAR_LIGHT, 4, GL_UNSIGNED_BYTE, specular);
shader_set_uniform_1f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_MATERIAL_SHININESS, 1, GL_FLOAT, &material_shininess);
shader_set_uniform_4f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_MATERIAL_COEFFICIENTS, 4, GL_FLOAT, material_coefficients);
shader_set_uniform_3f(&gouraud_shader, gouraud_shader.program, SHADER_UNIFORM_EYE_POSITION, 3, GL_FLOAT, &arcball.camera.pivot.position);
Mat identity = IDENTITY_MAT;
draw_grid(&global_static_canvas, 0, identity, (Color){127, 127, 127, 255}, 0.03f, 12.0f, 12.0f, 12);
Mat shading_label_transform = IDENTITY_MAT;
Quat text_rotation = IDENTITY_QUAT;
quat_from_axis_angle((Vec3f)X_AXIS, -PI/2.0f, text_rotation);
mat_rotate(shading_label_transform, text_rotation, shading_label_transform);
mat_translate(shading_label_transform, (float[4]){ 6.5, 0.0, -2.5, 1.0 }, shading_label_transform);
void BeforeDrawShader(ShaderProgram *theProgram) {
RenderState *rs;
Light *oneLight;
Material *mat;
Texture *tex;
int i;
if (theProgram == NULL) return;
rs = RenderStateScene();
shader_set_uniform_matrix4(theProgram->modeltoCamera_unif, OpenGLRS(rs, MG_MODELVIEW));
shader_set_uniform_matrix4(theProgram->modeltoWorld_unif, OpenGLRS(rs, MG_MODEL));
shader_set_uniform_matrix4(theProgram->CameraToClip_unif, OpenGLRS(rs, MG_PROJECTION));
shader_set_uniform_matrix4(theProgram->modeltoClip_unif, OpenGLRS(rs, MG_MODELVIEW_PROJECTION));
i = 0;
oneLight = StartLoop(rs->lightList);
while (oneLight) {
if (IsOnLight(oneLight)) {
if (i == 4) { // MG_MAX_LIGHTS
fprintf(stderr, "[W] too many active lights. Discarding the rest\n");
break;
}
shader_set_uniform_4fv(theProgram->light_unif[i].position, GetPositionLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].diffuse, GetDiffuseLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].ambient, GetAmbientLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].specular, GetSpecularLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].attenuation, GetAttenuationVectorLight(oneLight));
if (IsSpotLight(oneLight)) {
shader_set_uniform_3fv(theProgram->light_unif[i].spotDir, GetSpotDirectionLight(oneLight));
shader_set_uniform_1f(theProgram->light_unif[i].exponent, GetSpotExponentLight(oneLight));
shader_set_uniform_1f(theProgram->light_unif[i].cosCutOff, cosf(GetSpotCutoffLight(oneLight)));
} else {
shader_set_uniform_1f(theProgram->light_unif[i].cosCutOff, 0.0f); // if (cos) cutoff is zero -> no spotLight
}
++i;
}
oneLight = GetNext(rs->lightList);
}
shader_set_uniform_1i(theProgram->activeLights_unif, i);
mat = rs->frontMaterial;
if (mat != NULL) {
shader_set_uniform_3fv(theProgram->mat_unif.ambient, GetAmbientMaterial(mat));
shader_set_uniform_3fv(theProgram->mat_unif.diffuse, GetDiffuseMaterial(mat));
shader_set_uniform_3fv(theProgram->mat_unif.specular, GetSpecularMaterial(mat));
shader_set_uniform_1f(theProgram->mat_unif.shininess, GetShininessMaterial(mat));
shader_set_uniform_1f(theProgram->mat_unif.alpha, GetAlphaMaterial(mat));
tex = GetTextureMaterial(mat);
if (tex != NULL) {
// Set texture to unit 0
BindGLTextureTunit(tex, 0);
shader_set_uniform_1i(theProgram->texSampler_unif, 0); // Texture unit 0
}
tex = GetBumpMapTextureMaterial(mat);
if (tex != NULL) {
// bumpMapping in texture unit 1
BindGLTextureTunit(tex, 1);
shader_set_uniform_1i(theProgram->bumpSampler_unif, 1); // Bump Texture unit 1
}
}
}
