ccore/test/modules/PlaneTests.c

#define IMPORT_CORE
#include "../Tests.h"
#include "core/Plane.h"
#include "core/ToString.h"

static const float eps = 0.0001f;

static void testToString() {
    Plane p;
    initPlane(&p, &V(3, 6, 8), &V(7, 6, 2), &V(4, 4, 4));
    char buffer[128];
    toString(&p, buffer, sizeof(buffer));
    TEST_STRING("(-0.684 x + 0.570 y + -0.456 z + 2.279)", buffer);
}

static void testSignedDistance() {
    Vector3 a = V(3, 6, 8);
    Vector3 b = V(7, 6, 2);
    Vector3 c = V(4, 4, 4);
    Plane p;
    initPlane(&p, &a, &b, &c);
    TEST_FLOAT(0.0f, signedDistance(&p, &a), eps);
    TEST_FLOAT(0.0f, signedDistance(&p, &b), eps);
    TEST_FLOAT(0.0f, signedDistance(&p, &c), eps);
    TEST_FLOAT(-1.13960576f, signedDistance(&p, &V(5, 8, 10)), eps);
    TEST_FLOAT(0.911684612f, signedDistance(&p, &V(3, 2, 1)), eps);
}

void testPlane() {
    testToString();
    testSignedDistance();
}