ccore/test/modules/PlaneTests.c

#include "../Tests.h"
#include "core/Plane.h"

static const float eps = 0.0001f;

#define CV3(a, b, c) (&(CoreVector3){{a, b, c}})

static void testToString1() {
    CorePlane p = CORE_PLANE;
    char buffer[128];
    coreToStringPlane(&p, buffer, sizeof(buffer));
    CORE_TEST_STRING("(0.000 x + 0.000 y + 0.000 z + 0.000)", buffer);
}

static void testToString2() {
    CorePlane p = CORE_PLANE;
    coreInitPlane(&p, CV3(3.0f, 6.0f, 8.0f), CV3(7.0f, 6.0f, 2.0f),
                  CV3(4.0f, 4.0f, 4.0f));
    char buffer[128];
    coreToStringPlane(&p, buffer, sizeof(buffer));
    CORE_TEST_STRING("(-0.684 x + 0.570 y + -0.456 z + 2.279)", buffer);
}

static void testSignedDistance() {
    CoreVector3 a = {{3.0f, 6.0f, 8.0f}};
    CoreVector3 b = {{7.0f, 6.0f, 2.0f}};
    CoreVector3 c = {{4.0f, 4.0f, 4.0f}};
    CorePlane p = CORE_PLANE;
    coreInitPlane(&p, &a, &b, &c);
    CORE_TEST_FLOAT(0.0f, coreGetSignedDistance(&p, &a), eps);
    CORE_TEST_FLOAT(0.0f, coreGetSignedDistance(&p, &b), eps);
    CORE_TEST_FLOAT(0.0f, coreGetSignedDistance(&p, &c), eps);
    CORE_TEST_FLOAT(-1.13960576f,
                    coreGetSignedDistance(&p, CV3(5.0f, 8.0f, 10.0f)), eps);
    CORE_TEST_FLOAT(0.911684612f,
                    coreGetSignedDistance(&p, CV3(3.0f, 2.0f, 1.0f)), eps);
}

void coreTestPlane() {
    testToString1();
    testToString2();
    testSignedDistance();
}