glm/test/gtx/gtx_rotate_vector.cpp

#define GLM_ENABLE_EXPERIMENTAL
#include <glm/gtx/rotate_vector.hpp>
#include <glm/gtc/constants.hpp>
#include <glm/ext/vector_relational.hpp>

static int test_rotate()
{
	int Error = 0;

	glm::vec2 A = glm::rotate(glm::vec2(1, 0), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(A, glm::vec2(0.0f, 1.0f), glm::epsilon<float>())) ? 0 : 1;

	glm::vec3 B = glm::rotate(glm::vec3(1, 0, 0), glm::pi<float>() * 0.5f, glm::vec3(0, 0, 1));
	Error += glm::all(glm::equal(B, glm::vec3(0.0f, 1.0f, 0.0f), glm::epsilon<float>())) ? 0 : 1;

	glm::vec4 C = glm::rotate(glm::vec4(1, 0, 0, 1), glm::pi<float>() * 0.5f, glm::vec3(0, 0, 1));
	Error += glm::all(glm::equal(C, glm::vec4(0.0f, 1.0f, 0.0f, 1.0f), glm::epsilon<float>())) ? 0 : 1;

	return Error;
}

static int test_rotateX()
{
	int Error = 0;

	glm::vec3 D = glm::rotateX(glm::vec3(1, 0, 0), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(D, glm::vec3(1.0f, 0.0f, 0.0f), glm::epsilon<float>())) ? 0 : 1;

	glm::vec4 E = glm::rotateX(glm::vec4(1, 0, 0, 1), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(E, glm::vec4(1.0f, 0.0f, 0.0f, 1.0f), glm::epsilon<float>())) ? 0 : 1;

	return Error;
}

static int test_rotateY()
{
	int Error = 0;

	glm::vec3 F = glm::rotateY(glm::vec3(1, 0, 0), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(F, glm::vec3(0.0f, 0.0f, -1.0f), glm::epsilon<float>())) ? 0 : 1;

	glm::vec4 G = glm::rotateY(glm::vec4(1, 0, 0, 1), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(G, glm::vec4(0.0f, 0.0f, -1.0f, 1.0f), glm::epsilon<float>())) ? 0 : 1;

	return Error;
}


static int test_rotateZ()
{
	int Error = 0;

	glm::vec3 H = glm::rotateZ(glm::vec3(1, 0, 0), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(H, glm::vec3(0.0f, 1.0f, 0.0f), glm::epsilon<float>())) ? 0 : 1;

	glm::vec4 I = glm::rotateZ(glm::vec4(1, 0, 0, 1), glm::pi<float>() * 0.5f);
	Error += glm::all(glm::equal(I, glm::vec4(0.0f, 1.0f, 0.0f, 1.0f), glm::epsilon<float>())) ? 0 : 1;

	return Error;
}

static int test_orientation()
{
	int Error = 0;

	glm::mat4 O = glm::orientation(glm::normalize(glm::vec3(1)), glm::vec3(0, 0, 1));
	Error += glm::all(glm::equal(O[0], glm::vec4(0.79f, -0.21f,-0.58f, 0.0f), 0.1f)) ? 0 : 1;
	Error += glm::all(glm::equal(O[1], glm::vec4(-0.21f, 0.79f,-0.58f, 0.0f), 0.1f)) ? 0 : 1;
	Error += glm::all(glm::equal(O[2], glm::vec4(0.58f, 0.58f, 0.58f, 0.0f), 0.1f)) ? 0 : 1;
	Error += glm::all(glm::equal(O[3], glm::vec4(0.0f, 0.0f, 0.0f, 1.0f), 0.1f)) ? 0 : 1;

	return Error;
}

int main()
{
	int Error = 0;

	Error += test_rotate();
	Error += test_rotateX();
	Error += test_rotateY();
	Error += test_rotateZ();
	Error += test_orientation();

	return Error;
}