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, 6, 8), CV3(7, 6, 2), CV3(4, 4, 4));
    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, 6, 8}};
    CoreVector3 b = {{7, 6, 2}};
    CoreVector3 c = {{4, 4, 4}};
    CorePlane p = CORE_PLANE;
    coreInitPlane(&p, &a, &b, &c);
    CORE_TEST_FLOAT(0.0f, coreSignedDistance(&p, &a), eps);
    CORE_TEST_FLOAT(0.0f, coreSignedDistance(&p, &b), eps);
    CORE_TEST_FLOAT(0.0f, coreSignedDistance(&p, &c), eps);
    CORE_TEST_FLOAT(-1.13960576f, coreSignedDistance(&p, CV3(5, 8, 10)), eps);
    CORE_TEST_FLOAT(0.911684612f, coreSignedDistance(&p, CV3(3, 2, 1)), eps);
}

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