ccore/test/modules/FrustumTests.c

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

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

static void testToString() {
    CoreFrustum f;
    coreInitFrustum(&f, 60.0f, 0.1f, 1000.0f);
    char buffer[128];
    coreToStringFrustum(&f, buffer, sizeof(buffer));
    CORE_TEST_STRING("(tan = 0.577, nearClip = 0.100, farClip = 1000.000)",
                     buffer);
}

static void testPointIsInside() {
    CoreIntVector2 size = {{200, 100}};
    CoreFrustum f;
    coreInitFrustum(&f, 60.0f, 0.1f, 1000.0f);
    coreUpdateFrustumPlanes(&f, CV3(0, 0, 0), CV3(1, 0, 0), CV3(0, 1, 0),
                            CV3(0, 0, 1), &size);

    CORE_TEST_TRUE(coreIsInsideFrustum(&f, CV3(0, 0, 5)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(0, 0, 1004)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(0, 0, -5)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(0, 50, 5)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(0, -50, 5)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(50, 0, 5)));
    CORE_TEST_FALSE(coreIsInsideFrustum(&f, CV3(-50, 0, 5)));
}

static void testSphereIsInside() {
    CoreIntVector2 size = {{200, 100}};
    CoreFrustum f;
    coreInitFrustum(&f, 60.0f, 0.1f, 1000.0f);
    coreUpdateFrustumPlanes(&f, CV3(0, 0, 0), CV3(1, 0, 0), CV3(0, 1, 0),
                            CV3(0, 0, 1), &size);

    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, 0, 5), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(0, 0, 1004), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(0, 0, -5), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(0, 50, 5), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(0, -50, 5), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(50, 0, 5), 3));
    CORE_TEST_FALSE(coreIsInsideFrustumRadius(&f, CV3(-50, 0, 5), 3));

    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, 0, 5), 3));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, 0, 1004), 50));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, 0, -5), 50));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, 50, 5), 50));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(0, -50, 5), 50));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(50, 0, 5), 50));
    CORE_TEST_TRUE(coreIsInsideFrustumRadius(&f, CV3(-50, 0, 5), 50));
}

static void testUpdateProjection() {
    CoreFrustum f;
    coreInitFrustum(&f, 60.0f, 0.1f, 1000.0f);
    const CoreMatrix* m =
        coreUpdateProjection(&f, &(CoreIntVector2){{400, 300}});
    char buffer[128];
    coreToStringMatrix(m, buffer, sizeof(buffer));
    CORE_TEST_STRING("[[1.299, 0.000, 0.000, 0.000], "
                     "[0.000, 1.732, 0.000, 0.000], "
                     "[0.000, 0.000, -1.000, -0.200], "
                     "[0.000, 0.000, -1.000, 0.000]]",
                     buffer);
}

void testFrustum() {
    testToString();
    testPointIsInside();
    testSphereIsInside();
    testUpdateProjection();
}