Game bai 3D va bai toan tai tao cam giac ngoi dung ban

Khi mot nguoi choi o Da Nang mo ung dung vao luc 21h thu Bay, dieu dau tien anh ta thay khong phai la nut "Choi ngay" ma la mot ban Tien Len co bon ghe, moi ghe la mot avatar dung bang mesh 3D dang cam tren tay 13 la bai nghieng theo goc nhin phoi canh. Nguoi chia bai xao bai mat dung 1,8 giay, la bai bay ra theo quy dao parabol hoi lech trai, roi dap xuong mat ban go co van phan chieu. Toan bo doan phim do chay trong khoang 420 mili giay. Do la ranh gioi phan biet Game bai 3D voi phien ban 2D ma phan lon nguoi choi Viet Nam da quen tu giai doan 2014-2018.

Xem them tai: game bai

Su khac biet nam o con so, khong nam o cam nhan chung chung. Mot bo bai 2D truyen thong dung 52 sprite kich thuoc 512x512 pixel, tong dung luong khoang 3-5MB sau khi nen. Chuyen sang 3D, moi la bai tro thanh mot mesh phang co do day 0,4mm voi hai mat texture rieng, con moi avatar can rig tu 60 den 80 xuong de cu dong ngon tay khi rut bai. Rieng khau dung hinh nhan vat da ngon 4.000 den 8.000 tam giac moi nguoi. Nhan bon ghe, cong them nguoi chia bai va dao cu tren ban, canh choi day len gan 40.000 tam giac. Voi GPU tam trung, day van la muc chap nhan duoc, nhung no giai thich vi sao cac studio phai can nhac rat ky truoc khi them chi tiet.

Chuyen dong moi la phan kho. Khi chia bai, engine mo phong quan tinh de la bai xoay quanh truc Y khoang 15 do roi ham lai sau 0,4 giay. Neu lap trinh vien de la bai dung dot ngot, mat nguoi nhan ra ngay su gia tao, du phan lon khong goi ten duoc cam giac do. Kinh nghiem tu cac ban build thu cho thay nguoi choi chi mat khoang 6 den 8 van de quen voi nhip animation, sau do ho bat dau de y den nhung chi tiet nho nhu la bai co do bong dung huong hay khong. Day la ly do cac doi phat trien thuong danh 20-25% thoi gian du an chi cho khau tinh chinh animation.

Ve ha tang, Game bai 3D dung kien truc server authoritative, tuc may chu quyet dinh ket qua va thiet bi chi hien thi lai. Tick rate cho game bai thuong dat o 20Hz, thap hon nhieu so voi 64Hz cua game ban sung, vi hanh dong dien ra theo luot chu khong lien tuc. Do tre chap nhan duoc roi vao khoang 150 den 250 mili giay. Vuot nguong 300 mili giay, nguoi choi bat dau cam thay la bai roi lech khoi tieng dong, va cam giac "co gi do sai" xuat hien du ho khong biet nguyen nhan. Cac nha van hanh tai Viet Nam thuong dat may chu tai Ha Noi va TP.HCM, dong thoi dung them mot cum o Singapore cho nguoi choi khu vuc phia Nam.

Danh muc tro choi quyet dinh do phuc tap ky thuat. Tien Len Mien Nam va Sam Loc tuong doi de vi moi luot chi vai la bai chuyen dong. Phom phuc tap hon o khau hien thi phom da ha, doi hoi sap xep lai vi tri mesh theo thoi gian thuc. Xi Dach them phan lat bai up voi hieu ung anh sang chieu tu tren xuong. Nhung Mau Binh moi la con ac mong. Muoi ba la bai hien thi cung luc, chia thanh ba chi, nghia la gan 26 mat texture phai render dong thoi neu khong gop batch. Cach xu ly pho bien la dung texture atlas gom toan bo la bai vao mot anh 2.048x2.048 duy nhat, ket hop GPU instancing de giam so draw call tu hon 200 xuong con khoang 8 den 12. Khong co toi uu nay, mot van Mau Binh tren may pho thong se tut xuong duoi 20 khung hinh moi giay.

Thiet bi muc tieu o thi truong Viet Nam khong phai iPhone 15. Phan lon nguoi choi dung may tam trung nhu Redmi Note 12 chay Snapdragon 685 voi 4GB RAM, hoac cac mau Oppo, Vivo cung phan khuc. Muc tieu thuc te la giu 30 khung hinh moi giay on dinh, dung luong goi cai dat duoi 120MB, va bo nho dem duoi 400MB khi dang choi. Mot so studio chon cach nen texture theo dinh dang ASTC thay vi PNG de tiet kiem 60-70% dung luong. Viec tai tai nguyen theo giai doan cung quan trong: chi nap ban choi va avatar co ban truoc, phan trang phuc, hieu ung chien thang, va am thanh nap sau.

Kinh te trong game van hanh theo mo hinh rat cu the. Mot ban choi muc 1.000 chip thu phe khoang 5% moi van, tuc 50 chip. Voi 20 van moi phien va 1.000 nguoi choi dong thoi tren mot cum may chu, luong chip luu hanh bi hut ra khoi he thong moi gio roi vao khoang mot trieu don vi. Con so nay buoc nha van hanh phai thiet ke nhiem vu hang ngay, qua dang nhap, va su kien cuoi tuan de bom lai chip, neu khong cac ban cap thap se can nguoi choi trong vong vai tuan.

Hanh vi nguoi choi cung co mau ro rang. Thoi luong phien trung binh dao dong 22 den 28 phut, tuong ung 15 den 20 van. Ti le nguoi choi quay lai trong vong 24 gio thuong dat 35-45% neu co yeu to xa hoi nhu chat thoai hoac tinh nang ket ban. Khi loai bo chat thoai, ti le nay roi xuong duoi 25%. Noi cach khac, phan 3D chi giu chan nguoi choi trong tuan dau; yeu to xa hoi moi quyet dinh thang thu hai.

Khong the bo qua khia canh phap ly. Tai Viet Nam, cac tro choi co thuong dua tren ket qua game bai bi dieu chinh chat che, va Nghi dinh 144/2021 xu phat hanh vi danh bac trai phep voi muc tien cu the. Nhung san pham Game bai 3D hop phap tren thi truong deu loai bo co che doi thuong ra tien that, chi giu chip ao khong quy doi. Nguoi choi can phan biet ro: giao dien 3D dep khong dong nghia voi viec nen tang do duoc cap phep.

Chong gian lan la cuoc chien tham lang. Cac hinh thuc pho bien gom bot tu dong choi theo xac suat, nhom nguoi choi dung ung dung nhan tin ben ngoai de chia se bai, va tai khoan ao bom chip. He thong phat hien dua tren phan tich ti le thang bat thuong, thoi gian ra quyet dinh qua nhanh hoac qua deu dan, va mau dia chi IP trung lap. Mot tai khoan thang 62% so van trong 500 van lien tiep gan nhu chac chan nam trong danh sach theo doi, vi muc hop ly cho nguoi choi gioi chi roi vao 53-56%.

Huong phat trien gan day nghieng ve WebGPU va cloud streaming. Chay Game bai 3D truc tiep tren trinh duyet ma khong can cai dat giup giam rao can gia nhap xuong gan bang khong, dong thoi giai phong dung luong may. Doi lai, nguoi choi phu thuoc hoan toan vao chat luong mang. Avatar tuy bien sau, bieu cam khuon mat theo thoi gian thuc, va cac ban choi chu de nhu song bai Ma Cao hay phong khach tan co dien cung dang tro thanh tieu chuan moi thay vi diem cong.

Dieu dang chu y la phan lon nguoi choi khong mo ta san pham bang thuat ngu ky thuat. Ho noi "nhin that" hoac "nhin gia". Khoang cach giua hai nhan xet do nam o hang tram gio tinh chinh do bong, vat ly la bai, va nhip animation ma khong ai nhin thay truc tiep. Game bai 3D thanh cong khi nguoi choi quen mat rang minh dang nhin vao mot mo phong, va bat dau phan ung voi la bai tren ban y nhu the no dang nam trong tay ho.