Implement motion_changeyby block

Author: adazem009

src/blocks/motionblocks.cpp

@@ -49,6 +49,7 @@ void MotionBlocks::registerBlocks(IEngine *engine)
     engine->addCompileFunction(this, "motion_glideto", &compileGlideTo);
     engine->addCompileFunction(this, "motion_changexby", &compileChangeXBy);
     engine->addCompileFunction(this, "motion_setx", &compileSetX);
+    engine->addCompileFunction(this, "motion_changeyby", &compileChangeYBy);
 }
 
 CompilerValue *MotionBlocks::compileMoveSteps(Compiler *compiler)
@@ -268,6 +269,16 @@ CompilerValue *MotionBlocks::compileSetX(Compiler *compiler)
     return nullptr;
 }
 
+CompilerValue *MotionBlocks::compileChangeYBy(Compiler *compiler)
+{
+    if (!compiler->target()->isStage()) {
+        CompilerValue *dy = compiler->addInput("DY");
+        compiler->addTargetFunctionCall("motion_changeyby", Compiler::StaticType::Void, { Compiler::StaticType::Number }, { dy });
+    }
+
+    return nullptr;
+}
+
 extern "C" void motion_movesteps(Sprite *sprite, double steps)
 {
     double dir = sprite->direction();
@@ -542,6 +553,11 @@ extern "C" void motion_setx(Sprite *sprite, double x)
     sprite->setX(x);
 }
 
+extern "C" void motion_changeyby(Sprite *sprite, double dy)
+{
+    sprite->setY(sprite->y() + dy);
+}
+
 extern "C" double motion_xposition(Sprite *sprite)
 {
     return sprite->x();

src/blocks/motionblocks.h

@@ -28,6 +28,7 @@ class MotionBlocks : public IExtension
         static CompilerValue *compileGlideTo(Compiler *compiler);
         static CompilerValue *compileChangeXBy(Compiler *compiler);
         static CompilerValue *compileSetX(Compiler *compiler);
+        static CompilerValue *compileChangeYBy(Compiler *compiler);
 };
 
 } // namespace libscratchcpp

test/blocks/motion_blocks_test.cpp

@@ -1664,3 +1664,36 @@ TEST_F(MotionBlocksTest, SetX)
         builder.run();
     }
 }
+
+TEST_F(MotionBlocksTest, ChangeYBy)
+{
+    {
+        auto sprite = std::make_shared<Sprite>();
+        ScriptBuilder builder(m_extension.get(), m_engine, sprite);
+
+        builder.addBlock("motion_changeyby");
+        builder.addValueInput("DY", 30.25);
+
+        sprite->setX(5.2);
+        sprite->setY(-0.25);
+        sprite->setDirection(-61.42);
+
+        builder.build();
+        builder.run();
+        ASSERT_EQ(sprite->x(), 5.2);
+        ASSERT_EQ(sprite->y(), 30);
+    }
+
+    m_engine->clear();
+
+    {
+        auto stage = std::make_shared<Stage>();
+        ScriptBuilder builder(m_extension.get(), m_engine, stage);
+
+        builder.addBlock("motion_changeyby");
+        builder.addValueInput("DY", 30.25);
+
+        builder.build();
+        builder.run();
+    }
+}