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編輯........所以我已經擺脫了所有廢話，只是有一個SSCE現在（希望我明白現在是什麼）。對於那些還沒有看到這個問題的人，我想在調整大小的時候保持高寬比，但是窗口的行爲好像我已經評論過任何與調整大小有關的事情（它會拉伸）。我已經檢查了所有點上的投影矩陣，並且它在你期望的點上變化，並且保持在你期望的點上。gluPerspective和glOrtho都沒有任何效果
我刪除了依賴其他文件的東西，所以它應該爲你編譯，除了着色器文件，我也會發布他們的代碼（它們很短）。我很抱歉，它看起來不太好格式化，很難保持格式不得不在大多數行前放置4個空格。
線立方體不會出現的方式。但是當我逐字複製我的第一個回答者的建議並編譯它時，它確實出現了。不知道這是否與我的問題有關。
#define GLEW_STATIC
#include "glew.h"
#include "glut.h"
#include <Windows.h>
#include <iostream>
//#include "TgaParser.h"
//#include "Vertex.h"
//#include "ObjParser.h"
//#include "Car.h"
//#include "Floor.h"
//#include "BitmapParser.h"
using namespace std;
#pragma comment(lib,"winmm.lib")
#pragma comment(lib,"glut32.lib")
#pragma comment(lib, "glew32s.lib")
/*GLOBALS*/
int g_ScreenWidth = 800;
int g_ScreenHeight = 800;
int g_Program = 0;
int g_PositionHandle = 0;
int g_TextureCoordhandle = 0;
int g_ModelMatrixHandle = 0;
//Car* g_pCar = 0;
//Floor* g_pFloor = 0;
void error(char * error)
{
printf(error);
system("pause");
exit(0);
}
static void checkGlError(const char* op)
{
for (GLint error = glGetError(); error; error
= glGetError())
{
const GLubyte* sError = gluErrorString(error);
printf("Shader error %s\n",sError);
}
}
GLuint loadShader(GLenum shaderType, const char* pSource)
{
GLuint shader = glCreateShader(shaderType);
if (shader)
{
glShaderSource(shader, 1, &pSource, NULL);
glCompileShader(shader);
GLint compiled = 0;
glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
checkGlError("createVertexShader");
if (!compiled)
{
GLint infoLen = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
if (infoLen)
{
char* buf = (char*) malloc(infoLen);
if (buf)
{
glGetShaderInfoLog(shader, infoLen, NULL, buf);
printf(buf);
free(buf);
}
glDeleteShader(shader);
shader = 0;
}
}
}
return shader;
}
GLuint createProgram(const char* pVertexSource, const char* pFragmentSource)
{
GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
checkGlError("createVertexShader");
if (!vertexShader)
{
return 0;
}
GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
if (!pixelShader)
{
return 0;
}
GLuint program = glCreateProgram();
g_Program=program;
if (program)
{
glAttachShader(program, vertexShader);
checkGlError("glAttachShader");
glAttachShader(program, pixelShader);
checkGlError("glAttachShader");
glLinkProgram(program);
GLint linkStatus = GL_FALSE;
glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
if (linkStatus != GL_TRUE)
{
GLint bufLength = 0;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
if (bufLength)
{
char* buf = (char*) malloc(bufLength);
if (buf)
{
glGetProgramInfoLog(program, bufLength, NULL, buf);
free(buf);
}
}
glDeleteProgram(program);
program = 0;
}
}
return program;
}
void forward_display()
{
glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60, (GLfloat)g_ScreenWidth/(GLfloat)g_ScreenHeight, 0.1, 100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//gluLookAt(0, -0.5, 1, 0, 0, -1, 0, 1, 0);
//glPushMatrix();
//glRotatef(timeGetTime()*0.05,0,1,0);
//g_pCar->Draw(g_ModelMatrixHandle, g_PositionHandle, g_TextureCoordhandle);
//glPopMatrix();
glTranslatef(0, 0, -2);
glColor3f(1,0,0);
glRotatef(45, 1, 1, 0);
glutWireCube(1);
glutSwapBuffers();
}
void forward_animate()
{
forward_display();
}
/*Reads in all of the data contents automatically allocating memory for the content*/
char* readFileData (char * fileName)
{
FILE *fp = fopen(fileName,"r");
if (fp==0)
{
error("Why is all rum gone!!\n");
return 0;
}
fseek(fp, 0L, SEEK_END);
int sz = ftell(fp);
fseek(fp, 0L, SEEK_SET);
char * data = new char[sz+1];
memset(data,0,sz+1);
fread(data,1,sz,fp);
fclose(fp);
return data;
}
void init()
{
char * vertexShaderBuffer = readFileData("../resources/shaders/IntroToShaders.vs");
char * pixelShaderBuffer = readFileData("../resources/shaders/IntroToShaders.ps");
g_Program = createProgram (vertexShaderBuffer, pixelShaderBuffer);
//We have finished compiling the shader now delete the char arrays with the source code
delete [] vertexShaderBuffer;
delete [] pixelShaderBuffer;
g_PositionHandle = glGetAttribLocation(g_Program, "vPosition");
g_TextureCoordhandle = glGetAttribLocation(g_Program, "vTextureCoord");
g_ModelMatrixHandle = glGetUniformLocation(g_Program, "modelview_matrix");
if (g_PositionHandle == -1)
{
printf("g_PositionHandle is bad\n");
}
if (g_TextureCoordhandle == -1)
{
printf("g_TextureCoordhandle is bad\n");
}
if (g_ModelMatrixHandle == -1)
{
printf("g_ModelMatrixHandle is bad\n");
}
glUseProgram(g_Program);
//g_pCar = new Car();
//g_pCar->Initialise();
//g_pFloor = new Floor();
//g_pFloor->Initialise();
//g_pCar->InitTextures();
//g_pFloor->InitTextures();
//g_pCar->LoadTextures();
//g_pFloor->LoadTextures();
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
void reshape(int w, int h)
{
g_ScreenWidth = w;
g_ScreenHeight = h;
glViewport(0, 0, w, h);
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(g_ScreenWidth, g_ScreenHeight);
glutCreateWindow("Assignment 1");
glewInit();
init();
glutDisplayFunc(forward_display);
glutIdleFunc(forward_animate);
glutReshapeFunc(reshape);
glutMainLoop();
/*
DONT DO THINGS HERE
*/
return 0;
}
IntroToShaders.ps：
varying vec2 vTexCoord;
uniform sampler2D myTexture;
void main (void)
{
gl_FragColor = texture2D(myTexture, vTexCoord);
}
IntroToShaders.vs：
attribute vec3 vPosition;
attribute vec2 vTextureCoord;
varying vec2 vTexCoord;
uniform mat4 modelview_matrix;
void main(void)
{
vTexCoord = vTextureCoord;
gl_Position = modelview_matrix*vec4(vPosition,1.0);
}
-1：類似於你的*不*你有什麼。發佈工作代碼並不能幫助我們在*不工作的代碼中找到問題。我們需要看到您的*代碼的SSCCE，它表現出您遇到的問題。 – 2013-04-27 04:58:58
「很難保持格式不得不在大多數行前放置4個空格。」...如果您使用Visual Studio/Eclipse/Netbeans進行編輯，只需在選項中設置4-space選項卡，請選擇您的整個程序，然後點擊選項卡。它應該縮進4個空格。 – genpfault 2013-04-30 02:24:36
謝謝genpfault !!!我會在下次發佈一個問題時做到這一點:-) – Erin 2013-04-30 03:51:49