cs1.6方框透视
概述
这篇wiki介绍了怎么cs1.6的方框透视
涉及内容
Cheat Engine的使用
Visual Studio的使用
界面用Windows MFC绘制
方框用sdl2框架绘制
涉及一些MVP矩阵知识
实现步骤
搜索矩阵
搜索mvp矩阵，mvp矩阵在其他文章中介绍，也可自行搜索相关文章附上我学习mvp矩阵的网页链接
mvp矩阵学习链接用狙击枪晃动，然后开镜关镜等操作搜索变动的数值以及用键盘Enter键来射击等枪静止搜索未变动的数值来定位mvp矩阵
- 根据观察mvp矩阵的特征可以大致观察找到的矩阵是否找对
代码实现
- 实现原理
上图可以看出，我们自身的坐标，也就是输入的顶点坐标，通过公式计算出自身在屏幕的位置，同理我们用这些矩阵乘上敌人坐标就能计算出敌人在屏幕的位置 - 代码实现首先我们计算出敌人位置在屏幕上的坐标，
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30for (uint32_t i = 1; i < players.size(); i++)
{
float ndc[3] = { 0 };
float clipCoords[4] = { 0 };
float clipCoords_yh = 0, ndc_yh = 0, yh_pos = 0;
float clipCoords_yl = 0, ndc_yl = 0, yl_pos = 0;
wi.game_width = 1920;
wi.game_height = 1080;
clipCoords[0] = players[i].x * selfMatrix[0][0] + players[i].y * selfMatrix[1][0] + players[i].z * selfMatrix[2][0] + selfMatrix[3][0];
clipCoords[1] = players[i].x * selfMatrix[0][1] + players[i].y * selfMatrix[1][1] + players[i].z * selfMatrix[2][1] + selfMatrix[3][1];
clipCoords[2] = players[i].x * selfMatrix[0][2] + players[i].y * selfMatrix[1][2] + players[i].z * selfMatrix[2][2] + selfMatrix[3][2];
clipCoords[3] = players[i].x * selfMatrix[0][3] + players[i].y * selfMatrix[1][3] + players[i].z * selfMatrix[2][3] + selfMatrix[3][3];
clipCoords_yh = players[i].x * selfMatrix[0][1] + players[i].y * selfMatrix[1][1] + (players[i].z + 25) * selfMatrix[2][1] + selfMatrix[3][1];
clipCoords_yl = players[i].x * selfMatrix[0][1] + players[i].y * selfMatrix[1][1] + (players[i].z - 35) * selfMatrix[2][1] + selfMatrix[3][1];
ndc[0] = clipCoords[0] / clipCoords[3];
ndc[1] = clipCoords[1] / clipCoords[3];
ndc[2] = clipCoords[2] / clipCoords[3];
ndc_yh = clipCoords_yh / clipCoords[3];
ndc_yl = clipCoords_yl / clipCoords[3];
if (clipCoords[3] < 0.1f)
continue;
// 屏幕坐标系x轴朝右y轴朝下，原点在屏幕左上角
players[i].x_pos = (wi.win_width / 2 * ndc[0]) + (wi.win_width / 2); //
players[i].y_pos = -(wi.win_height / 2 * ((ndc_yh + ndc_yl) / 2)) + (wi.win_height / 2);
yh_pos = -(wi.win_height / 2 * ndc_yh) + (ndc_yh + wi.win_height / 2);
yl_pos = -(wi.win_height / 2 * ndc_yl) + (ndc_yl + wi.win_height / 2);
players[i].rectangle_height = yl_pos - yh_pos;
players[i].rectangle_width = players[i].rectangle_height * 0.5f;
}
通过计算出人物方框的上边界yh和下边界yl，然后乘以0.5计算出矩形的宽度，这样得到了矩形的长和宽，还需要的一个坐标就是矩形的左上角位置坐标，我们通过人物坐标减去长宽的一半即可，下面是计算方框位置坐标和绘制方框代码1
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void drawBox(SDL_Renderer* render, TTF_Font* font)
{
char bloodStr[5];
SDL_Color color = { 0 };
SDL_SetRenderDrawColor(render, 0, 0, 0, 255);
SDL_RenderClear(render);
drawWindowBox(render);
if (players.size() == 0)
return;
for (int i = 1; i < players.size(); i++)
{
auto player = players[i];
if (player.team == players[0].team)
{
color = { 0, 255, 0, 255 };
SDL_SetRenderDrawColor(render, 0, 255, 0, 255);
}
else if (player.team != players[0].team)
{
color = { 255, 0, 0, 255 };
SDL_SetRenderDrawColor(render, 255, 0, 0, 255);
}
if (boxShowFlag == 0 || player.team != players[0].team)
{
SDL_Rect rect = { (int32_t)(player.x_pos - player.rectangle_width / 2),
(int32_t)(player.y_pos - player.rectangle_height / 2),
(int32_t)player.rectangle_width,
(int32_t)player.rectangle_height };
SDL_RenderDrawRect(render, &rect);
memset(bloodStr, 0x00, 5);
sprintf_s(bloodStr, "%d", player.blood);
SDL_Surface* surface = TTF_RenderText_Blended(font, bloodStr, color);
SDL_Texture* texture = SDL_CreateTextureFromSurface(render, surface);
SDL_FreeSurface(surface);
SDL_Rect rectFont = rect;
rectFont.w = 20;
rectFont.h = 18;
rectFont.y -= rectFont.w;
SDL_RenderCopy(render, texture, NULL, &rectFont);
}
}
if (bone_flag == 1)
{
readBonePosition((uint32_t)players.size());
drawBone(render);
}
SDL_RenderPresent(render);
}
绘制效果展示
