test/rotation_constraint_test.cpp

#include <rive/core/binary_reader.hpp>
#include <rive/file.hpp>
#include <rive/node.hpp>
#include <rive/bones/bone.hpp>
#include <rive/shapes/shape.hpp>
#include <rive/math/transform_components.hpp>
#include "no_op_renderer.hpp"
#include "rive_testing.hpp"
#include <cstdio>

TEST_CASE("rotation constraint updates world transform", "[file]") {
    FILE* fp = fopen("../../test/assets/rotation_constraint.riv", "r");
    REQUIRE(fp != nullptr);

    fseek(fp, 0, SEEK_END);
    auto length = ftell(fp);
    fseek(fp, 0, SEEK_SET);
    uint8_t* bytes = new uint8_t[length];
    REQUIRE(fread(bytes, 1, length, fp) == length);
    auto reader = rive::BinaryReader(bytes, length);
    rive::File* file = nullptr;
    auto result = rive::File::import(reader, &file);

    REQUIRE(result == rive::ImportResult::success);
    REQUIRE(file != nullptr);
    REQUIRE(file->artboard() != nullptr);

    auto artboard = file->artboard();

    REQUIRE(artboard->find<rive::TransformComponent>("target") != nullptr);
    auto target = artboard->find<rive::TransformComponent>("target");

    REQUIRE(artboard->find<rive::TransformComponent>("rect") != nullptr);
    auto rectangle = artboard->find<rive::TransformComponent>("rect");

    artboard->advance(0.0f);
    rive::TransformComponents targetComponents;
    rive::Mat2D::decompose(targetComponents, target->worldTransform());
    rive::TransformComponents rectComponents;
    rive::Mat2D::decompose(rectComponents, rectangle->worldTransform());

    REQUIRE(targetComponents.rotation() == rectComponents.rotation());

    delete file;
    delete[] bytes;
}