Refactoring in Software Development: Techniques and Benefits for Clean Code

1. #1 Refactoring Methods of Development

2. Wat is refactoring?

4. Refactoring

5. Refactoring

6. Refactoren: waarom?

7. XtremeProgramming

8. Wensen van designers veranderenvaak

9. Wensen van designers veranderenvaak

10. Wensen van designers veranderenvaak

11. Wensen van designers veranderenvaak !!!

12. Wensen van designers veranderenvaak

13. Wensen van designers veranderenvaak

14. Wensen van designers veranderenvaak

15. Wensen van designers veranderenvaak

16. Wensen van designers veranderenvaak

19. refactor

21. Schone code vs later refactoren

22. X • Schone code vs later refactoren

23. Refactoren: hoe moetdat?

24. Minder code is betere code • Vermijdtdubbele code Welke code lijktveel op elkaar?

25. D3DXHANDLE refractionTechnique, skyTechnique, glowTechnique; • g_refractionEffect->FindNextValidTechnique(0, &refractionTechnique); • g_refractionEffect->SetTechnique(refractionTechnique); • g_skyEffect->FindNextValidTechnique(0, &skyTechnique); • g_skyEffect->SetTechnique(skyTechnique); • g_glowEffect->FindNextValidTechnique(0, &glowTechnique); • g_glowEffect->SetTechnique(glowTechnique);

26. D3DXHANDLE refractionTechnique, skyTechnique, glowTechnique; • g_refractionEffect->FindNextValidTechnique(0, &refractionTechnique); • g_refractionEffect->SetTechnique(refractionTechnique); • g_skyEffect->FindNextValidTechnique(0, &skyTechnique); • g_skyEffect->SetTechnique(skyTechnique); • g_glowEffect->FindNextValidTechnique(0, &glowTechnique); • g_glowEffect->SetTechnique(glowTechnique); void InitalizeEffect(D3DXEFFECT *effect, D3DXHANDLE &technique) { effect->FindNextValidTechnique(0, &technique); effect->SetTechnique(technique); }

27. Waterniethoortmoetweg

28. Code emigreren • Nieuwefunctie / member maken • Verhuizennaar (super)object • Verhuizennaar ‘free function’

29. Nieuwefunctie/ member • voidUpdateKaleidoscope(int kaleidoSides, float time) • { • … • tc[0] = center + zoom * D3DXVECTOR2(cosf(angle - 2.0f * 3.141592654f / 3.0f), sinf(angle - 2.0f * 3.141592654f / 3.0f)); • tc[1] = center + zoom * D3DXVECTOR2(cosf(angle), sin(angle)); • tc[2] = center + zoom * D3DXVECTOR2(cosf(angle + 2.0f * 3.141592654f / 3.0f), sinf(angle + 2.0f * 3.141592654f / 3.0f)); • … • floattriangleVertices[] = • { • p0.x, p0.y, 0.0f, tc[0].x, tc[0].y, • p1.x, p1.y, 0.0f, tx1.x, tx1.y, • p2.x, p2.y, 0.0f, tx2.x, tx2.y • }; • g_d3dDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, triangleVertices, 5 * sizeof(float)); • } • }

30. Nieuwefunctie/ member • voidUpdateKaleidoscope(int kaleidoSides, float time) • { • tc[0] = center + zoom * D3DXVECTOR2(cosf(angle - 2.0f * 3.141592654f / 3.0f), sinf(angle - 2.0f * 3.141592654f / 3.0f)); • tc[1] = center + zoom * D3DXVECTOR2(cosf(angle), sin(angle)); • tc[2] = center + zoom * D3DXVECTOR2(cosf(angle + 2.0f * 3.141592654f / 3.0f), sinf(angle + 2.0f * 3.141592654f / 3.0f)); • } • void RenderKaleidoscope() • { • floattriangleVertices[] = • { • p0.x, p0.y, 0.0f, tc[0].x, tc[0].y, • p1.x, p1.y, 0.0f, tx1.x, tx1.y, • p2.x, p2.y, 0.0f, tx2.x, tx2.y • }; • g_d3dDevice->DrawPrimitiveUP(D3DPT_TRIANGLELIST, 1, triangleVertices, 5 * sizeof(float)); • }

31. Verhuizennaar (super)object OBJECTKaleidoscope METHODS Update Render ATTRIBUTES vector0, vector1, vector2 center zoom

32. Verhuizennaar (super)object OBJECT Effect METHODSUpdate Render OBJECTKaleidoscope EXTENDS Effect ATTRIBUTES vector0, vector1, vector2 center zoom OBJECT Bloom EXTENDS Effect ATTRIBUTES …

33. Verhuizennaar ‘free function’ • stringToLower(string s) • { • transform(s.begin(), s.end(), s.begin(), ::tolower); • return s; • }

34. Maak code leesbaar • Repeat • Input->update(); • Physics()->update(); • World->Update(); • World->Render(); • Until…

35. Dit kun je nu al toepassen!

36. Eindopdracht • Inleveren in week 12