vs2015-OpenGL绘制三角形

程序运行截图如下：

 

代码如下：

ggl.h

#pragma once
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

scene.h

#pragma once

#include "ggl.h"

void Init();	//初始化3D场景
void Draw();	//3D绘画

main.cpp

#include "ggl.h"
#include "scene.h"

#pragma  comment(lib,"opengl32.lib")
#pragma  comment(lib,"glu32.lib")

LRESULT CALLBACK GLWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
	switch (msg) {
	case WM_CLOSE:
		PostQuitMessage(0);
		return 0;
	}
	return DefWindowProc(hwnd, msg, wParam, lParam);
}

INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevlnstance, LPSTR lpCmdLine, int nShowCmd) {

	WNDCLASSEX wndclass;
	wndclass.cbClsExtra = 0;
	wndclass.cbSize = sizeof(WNDCLASSEX);
	wndclass.cbWndExtra = 0;
	wndclass.hbrBackground = NULL;
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
	wndclass.hIcon = NULL;
	wndclass.hIconSm = NULL;
	wndclass.hInstance = hInstance;
	wndclass.lpfnWndProc = GLWindowProc;
	wndclass.lpszClassName = L"GLWindow";
	wndclass.lpszMenuName = NULL;
	wndclass.style = CS_VREDRAW | CS_HREDRAW;
	ATOM atam = RegisterClassEx(&wndclass);
	if (!atam) {
		MessageBox(NULL, L"Notice", L"Error", MB_OK);
		return 0;
	}
	RECT rect;
	rect.left = 0;
	rect.right = 800;
	rect.top = 0;
	rect.bottom = 600;
	AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, NULL);
	int windowWidth = rect.right - rect.left;
	int windowHeight = rect.bottom - rect.top;
	HWND hwnd = CreateWindowEx(NULL, L"GLWindow", L"OpenGL Window", WS_OVERLAPPEDWINDOW, 100, 100, windowWidth, windowHeight, NULL, NULL, hInstance, NULL);

	//OpenGL相关
	//选定像素格式
	HDC dc = GetDC(hwnd);
	PIXELFORMATDESCRIPTOR pfd;
	memset(&pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
	pfd.nVersion = 1;
	pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
	pfd.cColorBits = 32;

	//两个辅助缓存区
	pfd.cDepthBits = 24;
	pfd.cStencilBits = 8;

	pfd.iPixelType = PFD_TYPE_RGBA;
	pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
	int pixelFormat = ChoosePixelFormat(dc, &pfd);	//
	SetPixelFormat(dc, pixelFormat,&pfd);	//选取像素格式
	HGLRC rc = wglCreateContext(dc);
	wglMakeCurrent(dc, rc);		//使渲染环境生效
	Init();

	ShowWindow(hwnd, SW_SHOW);
	UpdateWindow(hwnd);
	MSG msg;
	while (true) {
		if (PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE)) {
			if (msg.message == WM_QUIT)
				break;
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
		Draw();
		SwapBuffers(dc);
	}
	return 0;
}

 

scene.cpp

#include "scene.h"

void Init() {
	//设置当前矩阵
	glMatrixMode(GL_PROJECTION);	//设置为投影矩阵（对矩阵造成影响的代码，都会影响当前矩阵）
	
	//第一个参数是垂直方面的视角，第二个是宽和高的比，第三个是最近可以看到的距离，第四个是最远距离
	gluPerspective(50.0f, 800.0f / 600.0f, 0.1f, 1000.0f);
	glMatrixMode(GL_MODELVIEW);//把当前矩阵切换为模型视图矩阵
	glLoadIdentity(); //加载一个单位矩阵
}

void Draw() {
	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);	//擦除背景使用的颜色（分别表示颜色分量的值）
	glClear(GL_COLOR_BUFFER_BIT);			//擦除当前背景颜色

	//开始绘制图形（三角形）
	glBegin(GL_TRIANGLES);
	glColor4ub(255, 255, 255, 255);	//设置当前颜色
	glVertex3f(-0.2f, -0.2f, -1.5f);	//设置顶点，使用当前颜色进行着色
	
	glColor4ub(255, 0, 0, 255);
	glVertex3f(0.2f, -0.2f, -1.5f);

	glColor4ub(0, 255, 0, 255);
	glVertex3f(0.0f, 0.2f, -1.5f);

	glEnd();
}