GRAPHENE_TEST_UNIT_END
GRAPHENE_TEST_UNIT_BEGIN (ray_closest_point_to_point)
{
graphene_point3d_t tmp = GRAPHENE_POINT3D_INIT (0.f, 0.f, 50.f);
graphene_point3d_t check = GRAPHENE_POINT3D_INIT (1.f, 1.f, 50.f);
graphene_point3d_t res;
graphene_ray_t r;
graphene_ray_init (&r, &one3, graphene_vec3_z_axis ());
if (g_test_verbose ())
g_test_message ("Behind the ray...");
graphene_ray_get_closest_point_to_point (&r, &zero3, &res);
g_assert_true (graphene_point3d_near (&res, &one3, 0.00001f));
if (g_test_verbose ())
g_test_message ("Front of the ray...");
graphene_ray_get_closest_point_to_point (&r, &tmp, &res);
g_assert_true (graphene_point3d_near (&res, &check, 0.00001f));
if (g_test_verbose ())
g_test_message ("On the ray...");
graphene_ray_get_closest_point_to_point (&r, &one3, &res);
g_assert_true (graphene_point3d_near (&res, &one3, 0.00001f));
}
static void
sphere_translate (mutest_spec_t *spec)
{
graphene_sphere_t s;
graphene_point3d_t p;
graphene_sphere_init (&s, &GRAPHENE_POINT3D_INIT (1.f, 1.f, 1.f), 1.f);
graphene_point3d_init (&p, -1.f, -1.f, -1.f);
graphene_sphere_translate (&s, &p, &s);
graphene_sphere_get_center (&s, &p);
mutest_expect ("translating a unit sphere from (1, 1, 1) by -1 puts it at (0, 0, 0)",
mutest_bool_value (graphene_point3d_equal (&p, &GRAPHENE_POINT3D_INIT (0.f, 0.f, 0.f))),
mutest_to_be_true,
NULL);
}
static void
sphere_distance (mutest_spec_t *spec)
{
graphene_sphere_t s;
graphene_sphere_init (&s, &GRAPHENE_POINT3D_INIT (1.f, 1.f, 1.f), 1.f);
mutest_expect ("distance of unit sphere from (0, 0, 0) is 0.7320",
mutest_float_value (graphene_sphere_distance (&s, &GRAPHENE_POINT3D_INIT (0, 0, 0))),
mutest_to_be_close_to, 0.7320, 0.001,
NULL);
mutest_expect ("distance of unit sphere from (1, 1, 1) is -1",
mutest_float_value (graphene_sphere_distance (&s, &GRAPHENE_POINT3D_INIT (1, 1, 1))),
mutest_to_be_close_to, -1.0, 0.001,
NULL);
}
static void
gst_gl_transformation_build_mvp (GstGLTransformation * transformation)
{
graphene_point3d_t translation_vector =
GRAPHENE_POINT3D_INIT (transformation->xtranslation * 2.0 *
transformation->aspect,
transformation->ytranslation * 2.0,
transformation->ztranslation * 2.0);
graphene_matrix_t model_matrix;
graphene_matrix_t projection_matrix;
graphene_matrix_t view_matrix;
graphene_matrix_t vp_matrix;
graphene_vec3_t eye;
graphene_vec3_t center;
graphene_vec3_t up;
graphene_vec3_init (&eye, 0.f, 0.f, 1.f);
graphene_vec3_init (¢er, 0.f, 0.f, 0.f);
graphene_vec3_init (&up, 0.f, 1.f, 0.f);
graphene_matrix_init_scale (&model_matrix,
transformation->xscale, transformation->yscale, 1.0f);
graphene_matrix_rotate (&model_matrix,
transformation->xrotation, graphene_vec3_x_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->yrotation, graphene_vec3_y_axis ());
graphene_matrix_rotate (&model_matrix,
transformation->zrotation, graphene_vec3_z_axis ());
graphene_matrix_translate (&model_matrix, &translation_vector);
if (transformation->ortho) {
graphene_matrix_init_ortho (&projection_matrix,
-transformation->aspect, transformation->aspect,
-1, 1, transformation->znear, transformation->zfar);
} else {
graphene_matrix_init_perspective (&projection_matrix,
transformation->fov,
transformation->aspect, transformation->znear, transformation->zfar);
}
graphene_matrix_init_look_at (&view_matrix, &eye, ¢er, &up);
graphene_matrix_multiply (&view_matrix, &projection_matrix, &vp_matrix);
graphene_matrix_multiply (&model_matrix, &vp_matrix,
&transformation->mvp_matrix);
}
static void
sphere_bounding_box (mutest_spec_t *spec)
{
graphene_sphere_t s;
graphene_box_t b, check;
graphene_box_init (&check,
&GRAPHENE_POINT3D_INIT (0.f, 0.f, 0.f),
&GRAPHENE_POINT3D_INIT (2.f, 2.f, 2.f));
graphene_sphere_init (&s, &GRAPHENE_POINT3D_INIT (1.f, 1.f, 1.f), 1.f);
graphene_sphere_get_bounding_box (&s, &b);
mutest_expect ("bounding box for a unit sphere centered in (1, 1, 1) is (0, 2)",
mutest_bool_value (graphene_box_equal (&b, &check)),
mutest_to_be_true,
NULL);
graphene_sphere_init (&s, &GRAPHENE_POINT3D_INIT (0.f, 0.f, 0.f), 0.f);
graphene_sphere_get_bounding_box (&s, &b);
mutest_expect ("bounding box for degenerate sphere is degenerate box",
mutest_bool_value (graphene_box_equal (&b, graphene_box_zero ())),
mutest_to_be_true,
NULL);
}
static void
sphere_empty (mutest_spec_t *spec)
{
graphene_sphere_t s;
graphene_sphere_init (&s, NULL, 0.f);
mutest_expect ("sphere with a radius of zero is empty",
mutest_bool_value (graphene_sphere_is_empty (&s)),
mutest_to_be_true,
NULL);
graphene_sphere_init (&s, &GRAPHENE_POINT3D_INIT (1.f, 1.f, 1.f), 1.f);
mutest_expect ("unit sphere is not empty",
mutest_bool_value (graphene_sphere_is_empty (&s)),
mutest_to_be_false,
NULL);
}
GRAPHENE_TEST_UNIT_END
GRAPHENE_TEST_UNIT_BEGIN (ray_get_distance_to_point)
{
graphene_ray_t r;
graphene_point3d_t tmp = GRAPHENE_POINT3D_INIT (0, 0, 50);
graphene_ray_init (&r, &one3, graphene_vec3_z_axis ());
if (g_test_verbose ())
g_test_message ("On the ray's origin...");
graphene_assert_fuzzy_equals (graphene_ray_get_distance_to_point (&r, &one3), 0.f, 0.00001);
if (g_test_verbose ())
g_test_message ("Behind the ray...");
graphene_assert_fuzzy_equals (graphene_ray_get_distance_to_point (&r, &zero3), sqrtf (3.f), 0.00001);
if (g_test_verbose ())
g_test_message ("On the ray...");
graphene_assert_fuzzy_equals (graphene_ray_get_distance_to_point (&r, &tmp), sqrtf (2.f), 0.00001);
}
void
gtk_snapshot_push_transform (GtkSnapshot *snapshot,
const graphene_matrix_t *transform,
const char *name,
...)
{
graphene_matrix_t offset;
graphene_matrix_t* real_transform;
graphene_matrix_init_translate (&offset,
&GRAPHENE_POINT3D_INIT(
snapshot->state->translate_x,
snapshot->state->translate_y,
0
));
real_transform = g_slice_new (graphene_matrix_t);
graphene_matrix_multiply (transform, &offset, real_transform);
char *str;
if (name)
{
va_list args;
va_start (args, name);
str = g_strdup_vprintf (name, args);
va_end (args);
}
else
str = NULL;
snapshot->state = gtk_snapshot_state_new (snapshot->state,
str,
NULL,
0, 0,
gtk_snapshot_collect_transform,
real_transform);
}
static void
sphere_contains_point (mutest_spec_t *spec)
{
graphene_point3d_t check, zero = GRAPHENE_POINT3D_INIT_ZERO;
graphene_sphere_t *s;
s = graphene_sphere_init (graphene_sphere_alloc (), &zero, 1.f);
mutest_expect ("unit sphere to contain origin",
mutest_bool_value (graphene_sphere_contains_point (s, &zero)),
mutest_to_be_true,
NULL);
graphene_point3d_init (&check, 1.f, 0.f, 0.f);
mutest_expect ("unit sphere to contain x=1",
mutest_bool_value (graphene_sphere_contains_point (s, &check)),
mutest_to_be_true,
NULL);
graphene_point3d_init (&check, 0.f, -1.f, 0.f);
mutest_expect ("unit sphere to contain y=-1",
mutest_bool_value (graphene_sphere_contains_point (s, &check)),
mutest_to_be_true,
NULL);
graphene_point3d_init (&check, 0.f, 0.f, 1.f);
mutest_expect ("unit sphere to contain z=1",
mutest_bool_value (graphene_sphere_contains_point (s, &check)),
mutest_to_be_true,
NULL);
mutest_expect ("unit sphere to not contain (1, 1, 1)",
mutest_bool_value (graphene_sphere_contains_point (s, &GRAPHENE_POINT3D_INIT (1, 1, 1))),
mutest_not, mutest_to_be_true,
NULL);
graphene_sphere_free (s);
}
static void
sphere_init (mutest_spec_t *spec)
{
graphene_point3d_t check;
graphene_point3d_t zero = GRAPHENE_POINT3D_INIT_ZERO;
graphene_point3d_t one = GRAPHENE_POINT3D_INIT (1, 1, 1);
graphene_sphere_t *s;
s = graphene_sphere_init (graphene_sphere_alloc (), &one, 1.f);
mutest_expect ("alloc to not return null",
mutest_pointer (s),
mutest_not, mutest_to_be_null,
NULL);
mutest_expect ("unit sphere not to be empty",
mutest_bool_value (graphene_sphere_is_empty (s)),
mutest_not, mutest_to_be_true,
NULL);
graphene_sphere_get_center (s, &check);
mutest_expect ("init to set the center",
mutest_bool_value (graphene_point3d_equal (&one, &check)),
mutest_to_be_true,
NULL);
mutest_expect ("init to set the radius",
mutest_float_value (graphene_sphere_get_radius (s)),
mutest_to_be_close_to, 1.0, 0.0001,
NULL);
graphene_sphere_init (s, NULL, 1.f);
graphene_sphere_get_center (s, &check);
mutest_expect ("null center to be the origin",
mutest_bool_value (graphene_point3d_equal (&zero, &check)),
mutest_to_be_true,
NULL);
graphene_sphere_free (s);
}
// The MAIN function, from here we start the application and run the game loop
int main()
{
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", NULL, NULL);
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
glewInit();
// Define the viewport dimensions
glViewport(0, 0, WIDTH, HEIGHT);
// Setup OpenGL options
glEnable(GL_DEPTH_TEST);
// Build and compile our shader program
shader our_shader = shader_new("shader.vs", "shader.frag");
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat vertices[] = {
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f
};
// World space positions of our cubes
graphene_point3d_t cubePositions[] = {
GRAPHENE_POINT3D_INIT(0.0f, 0.0f, 0.0f),
GRAPHENE_POINT3D_INIT( 2.0f, 5.0f, -15.0f),
GRAPHENE_POINT3D_INIT(-1.5f, -2.2f, -2.5f),
GRAPHENE_POINT3D_INIT(-3.8f, -2.0f, -12.3f),
GRAPHENE_POINT3D_INIT( 2.4f, -0.4f, -3.5f),
GRAPHENE_POINT3D_INIT(-1.7f, 3.0f, -7.5f),
GRAPHENE_POINT3D_INIT( 1.3f, -2.0f, -2.5f),
GRAPHENE_POINT3D_INIT( 1.5f, 2.0f, -2.5f),
GRAPHENE_POINT3D_INIT( 1.5f, 0.2f, -1.5f),
GRAPHENE_POINT3D_INIT(-1.3f, 1.0f, -1.5f)
};
GLuint VBO, VAO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);
glBindVertexArray(VAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
// TexCoord attribute
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glBindVertexArray(0); // Unbind VAO
// Load and create a texture
GLuint texture1;
GLuint texture2;
// ====================
// Texture 1
// ====================
glGenTextures(1, &texture1);
glBindTexture(GL_TEXTURE_2D, texture1); // All upcoming GL_TEXTURE_2D operations now have effect on our texture object
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture wrapping to GL_REPEAT
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
int width, height;
unsigned char* image = SOIL_load_image("container.jpg", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0); // Unbind texture when done, so we won't accidentily mess up our texture.
// ===================
// Texture 2
// ===================
glGenTextures(1, &texture2);
glBindTexture(GL_TEXTURE_2D, texture2);
// Set our texture parameters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
// Set texture filtering
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Load, create texture and generate mipmaps
image = SOIL_load_image("awesomeface.png", &width, &height, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
// Render
// Clear the colorbuffer
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Bind Textures using texture units
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture1);
glUniform1i(glGetUniformLocation(our_shader.program, "ourTexture1"), 0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, texture2);
glUniform1i(glGetUniformLocation(our_shader.program, "ourTexture2"), 1);
// Activate shader
shader_use(&our_shader);
// Create transformations
graphene_matrix_t view;
graphene_point3d_t view_point;
graphene_matrix_init_translate(&view, graphene_point3d_init(&view_point, 0.0f, 0.0f, -3.0f));
graphene_matrix_t projection;
graphene_matrix_init_perspective(&projection, 45.0f, (GLfloat) WIDTH / (GLfloat) HEIGHT, 0.1f, 100.0f);
// Get their uniform location
GLint modelLoc = glGetUniformLocation(our_shader.program, "model");
GLint viewLoc = glGetUniformLocation(our_shader.program, "view");
GLint projLoc = glGetUniformLocation(our_shader.program, "projection");
// Pass the matrices to the shader
GLfloat view_f[16] = {};
graphene_matrix_to_float(&view, view_f);
GLfloat proj_f[16] = {};
graphene_matrix_to_float(&projection, proj_f);
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, view_f);
// Note: currently we set the projection matrix each frame, but since the projection matrix rarely changes it's often best practice to set it outside the main loop only once.
glUniformMatrix4fv(projLoc, 1, GL_FALSE, proj_f);
glBindVertexArray(VAO);
for (GLuint i = 0; i < 10; i++)
{
// Calculate the model matrix for each object and pass it to shader before drawing
graphene_matrix_t model;
graphene_matrix_init_translate(&model, &cubePositions[i]);
GLfloat angle = 5.0f * i;
graphene_vec3_t axis;
graphene_vec3_init(&axis, -1.3f, 1.0f, -1.5f);
graphene_matrix_rotate(&model, angle, &axis);
GLfloat model_f[16] = {};
graphene_matrix_to_float(&model, model_f);
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, model_f);
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glBindVertexArray(0);
// Swap the screen buffers
glfwSwapBuffers(window);
}
// Properly de-allocate all resources once they've outlived their purpose
glDeleteVertexArrays(1, &VAO);
glDeleteBuffers(1, &VBO);
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate();
return 0;
}
