主要是原生 OpenGL 的驱动 bug 多到难以想象,并且还一个更比一个离谱,不同厂商的显卡驱动里的 OpenG...
由主线程在进行区块渲染前统一上传.如果使用VBO的话直接glBufferData,使用DisplayList的话就用VA进行渲染重...
using namespace std; void drawpixel1(int x, int y) { glColor3f(1.0, 0.0, 0.0); glVertex2d(x, y); } void drawpixel2(int x, int y) { glColor3f(0.0, 1.0, 0.0); glVertex2d(x, y); } void drawpixel3(int x, int y) { glColor3f(0.0, 0.0, 1.0); glVertex2d(x, y); } ...
As stated above, all we have to do is reduce the size of a given normal vector to a length of 1. To accomplish that, first you have to find the length of a normal vector. To find the length of any vector, you take all of the coordinate components (x, y and z) of that vector...
How exactly this is done will be covered in my matrix tutorial and is purely mathematical. glRotatef takes 4 parameters: the angle of rotation, and the direction of rotation specified by x, y and z coordinates, in the following form glRotatef(float angle, float x, float y, float z). The...
glRotatef用来设置opengl中绘制实体的自转方式,为我们的模型动起来做准备。比起之前的draw函数,这里多了glTexCoord2f,两参数分别为X轴坐标,Y轴坐标,用于绘制图形时指定纹理的坐标,其中x、y的坐标:0.0是纹理的左侧,1.0是纹理的右侧;0.0是纹理的底部,1.0是纹理的顶部。
comment(lib, "legacy_stdio_definitions.lib") // ---结构 struct MPOINT { GLdouble x, y; MPOINT() { } MPOINT(double x, double y) { this->x = x; this->y = y; } bool operator == (struct MPOINT& a) { return (abs(this->x - a.x<=2)) && (abs...
Activity Why is an OpenGL positional (spot) light interfering with non-positional light I have a legacy OpenGL fixed-pipeline app which has been ported from Windows (32-bit) to MacOS 64-bit. The problem is that if I have a scene with a non-positional light, everything works great. If ...
x; float lastSegmentY = to == 0 ? curve[1].y - curve[0].y : curve[to].y - curve[to-1].y; float lastSegmentInvLen = 1.f/(float)Math.hypot(lastSegmentX, lastSegmentY); GL20.glUniform4f(staticState.endPointLoc, curve[to].x, curve[to].y, lastSegmentX * lastSegmentInvLen,...
我想从我的Qt代码中调用这些函数,但这当然需要在调用OpenGL命令之前设置一个新的OpenGL上下文。create GL context" << std::endl;} callLegacyOpenGLCode(); 但不起作用这是在Windows 7上使用QT4.8编写的,使用< 浏览4提问于2014-01-30得票数 5 回答已采纳...