高手帮小弟我看看这段代码有关问题出在哪？关于OpenGL的
高手帮我看看这段代码问题出在哪？关于OpenGL的
先上代码：
rectangle.h
rectangle.cpp:
先上代码：
rectangle.h
#ifndef RECTANGLE_H_INCLUDED
#define RECTANGLE_H_INCLUDED
#include <GL/glew.h>
#include <GL/freeglut.h>
class rectangle
{
public:
rectangle();
rectangle(GLfloat x, GLfloat y, GLfloat w, GLfloat h);
rectangle(GLfloat x, GLfloat y, GLfloat w, GLfloat h, GLfloat r, GLfloat g, GLfloat b);
~rectangle();
void setUpperLeft(GLfloat x, GLfloat y);
void setWidth(GLfloat w);
void setHeight(GLfloat h);
void setColor(GLfloat r, GLfloat g, GLfloat b);
void setAll(GLfloat x, GLfloat y, GLfloat w, GLfloat h, GLfloat r, GLfloat g, GLfloat b);
GLfloat getUpperLeftX();
GLfloat getUpperLeftY();
GLfloat getWidth();
GLfloat getHeight();
void load();
void reloadData();
void draw();
private:
GLfloat ulx; // upper left x
GLfloat uly; // upper left y
GLfloat width;
GLfloat height;
GLfloat red;
GLfloat green;
GLfloat blue;
GLuint vboptr;
GLuint bufptr;
GLfloat vertices[16];
GLfloat colors[12];
void setVertexLocations();
void setVertexColors();
};
#endif // RECTANGLE_H_INCLUDED
rectangle.cpp:
#include <iostream>
#include "rectangle.h"
#include "LoadShaders.h"
#define BUFFER_OFFSET(x) ((const void*) (x))
GLint vPosition = 0;
GLint vColor = 1;
// 0 ----------- 3
// | \ |
// | \ |
// | \ |
// | \ |
// 1 ----------- 2
GLushort vertex_indices[] =
{
0, 1, 2,
2, 3, 0
};
rectangle::rectangle()
{
rectangle(0.0, 0.0, 1.0, 1.0, 1.0, 1.0, 1.0);
load();
}
rectangle::rectangle
(GLfloat x, GLfloat y, GLfloat w, GLfloat h):
ulx(x), uly(y), width(w), height(h),
red(1.0), green(1.0), blue(1.0)
{
rectangle(x, y, w, h, 1.0, 1.0, 1.0);
load();
}
rectangle::rectangle
(GLfloat x, GLfloat y, GLfloat w, GLfloat h,
GLfloat r, GLfloat g, GLfloat b):
ulx(x), uly(y), width(w), height(h),
red(r), green(g), blue(b)
{
load();
}
rectangle::~rectangle()
{
}
// Sets the x and y positions of the upper left corner of the rectangle.
void rectangle::setUpperLeft(GLfloat x, GLfloat y)
{
ulx = x;
uly = y;
}
// Sets the width of the rectangle
void rectangle::setWidth(GLfloat w)
{
width = w;
}
// Sets the height of the rectangle,
void rectangle::setHeight(GLfloat h)
{
height = h;
}
// Sets the color of the rectangle
void rectangle::setColor(GLfloat r, GLfloat g, GLfloat b)
{
red = r;
green = g;
blue = b;
}
// Sets all of the rectangle attributes
void rectangle::setAll(GLfloat x, GLfloat y, GLfloat w, GLfloat h, GLfloat r, GLfloat g, GLfloat b)
{
ulx = x;
uly = y;
width = w;
height = h;
red = r;
green = g;