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我不知道，如果它被称为图形神器，但看到这一点： http://img835.imageshack.us/img835/9785/anomoly.pngOpenGL的图形工件？
你会发现在黑色轮廓是不合时宜的6个像素。
我的应用程序可以在缩放，当我使我这样做：
渲染：
// Set an orthogonal projection matrix
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(GetCameraX() - ((float)controls.MainGlFrame.Dimensions.x) * scene[current.currentScene].camera.ScaleFactor
/2, GetCameraX() + ((float)controls.MainGlFrame.Dimensions.x) * scene[current.currentScene].camera.ScaleFactor/2,
GetCameraY() - ((float)controls.MainGlFrame.Dimensions.y) * scene[current.currentScene].camera.ScaleFactor/2,
GetCameraY() + ((float)controls.MainGlFrame.Dimensions.y) * scene[current.currentScene].camera.ScaleFactor/2,
-1.0f, 1.0f);
// Set the model matrix as the current matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
hdc = BeginPaint(controls.MainGlContext.mhWnd,&ps);
//start OGL code
相机结构是这样的：
struct SceneCam {
double x;
double y;
double tempX;
double tempY;
double ScaleFactor;
};
我怀疑这可能是问题因为我用来做的只是设置一个左上角的坐标系和GlTranslate我所有的几何图形，但我认为这样做更合适。文物是随机的，很少发生，但我仍然想摆脱它们。
感谢
Render:
void CGlEngine::RenderShapes()
{
// Set an orthogonal projection matrix
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(GetCameraX() - ((float)controls.MainGlFrame.Dimensions.x) * scene[current.currentScene].camera.ScaleFactor
/2, GetCameraX() + ((float)controls.MainGlFrame.Dimensions.x) * scene[current.currentScene].camera.ScaleFactor/2,
GetCameraY() - ((float)controls.MainGlFrame.Dimensions.y) * scene[current.currentScene].camera.ScaleFactor/2,
GetCameraY() + ((float)controls.MainGlFrame.Dimensions.y) * scene[current.currentScene].camera.ScaleFactor/2,
-1.0f, 1.0f);
// Set the model matrix as the current matrix
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
hdc = BeginPaint(controls.MainGlContext.mhWnd,&ps);
//start OGL code
glClear(GL_COLOR_BUFFER_BIT);
for(unsigned int currentlayer = 0; currentlayer < scene[current.currentScene].layer.size(); ++currentlayer)
{
for(unsigned int i = 0; i < scene[current.currentScene].layer[currentlayer].Shapes.size(); i++)
{
//render shape here
scene[current.currentScene].layer[currentlayer].Shapes[i].Render();
}
}
for(int i = 0; i < TempBuffers.size(); ++i)
{
if(scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints.size() > 1)
{
glColor3f(0,0,0);
glBindBufferARB(GL_ARRAY_BUFFER_ARB,controls.MainGlFrame.BufferVBO);
glBufferDataARB(GL_ARRAY_BUFFER_ARB,sizeof(GLdouble) * scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints.size() * 2
,(GLdouble*)(&scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints[0]),GL_STATIC_COPY);
glEnableClientState(GL_VERTEX_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, controls.MainGlFrame.BufferVBO);
glVertexPointer(2, GL_DOUBLE, 0, (char *) NULL); // Set The Vertex Pointer To The Vertex Buffer
if(scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].connected)
{
glDrawArrays(GL_LINE_LOOP, 0, scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints.size());
}
else
{
glDrawArrays(GL_LINE_STRIP, 0, scene[current.currentScene].layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints.size());
}
glColor3f(1,0.5,0.5);
//glDrawArrays(GL_POINTS, 0, layer[TempBuffers[i].layer].Shapes[TempBuffers[i].shape].Contour[0].DrawingPoints.size());
glDisableClientState(GL_VERTEX_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
}
/*
glColor3f(0,0,0);
glLineWidth(2);
*/
/*
if (ObjectBuffer.Contour[0].UserPoints.size() > 0)
{
glBegin(GL_LINES);
for(unsigned int i = 0; i < ObjectBuffer.Contour[0].DrawingPoints.size() - 1; ++i)
{
glVertex2d(ObjectBuffer.Contour[0].UserPoints[i].UserPoint.x,ObjectBuffer.Contour[0].UserPoints[i].UserPoint.y);
glVertex2d(ObjectBuffer.Contour[0].UserPoints[i + 1].UserPoint.x,ObjectBuffer.Contour[0].UserPoints[i + 1].UserPoint.y);
}
glEnd();
}
*/
//end OGL code
glFlush();
Sleep(1);
SwapBuffers(hdc);
EndPaint(controls.MainGlContext.mhWnd,&ps);
}
调整大小：
void CGlFrame::resize(HWND mainWindow,CGlContext *context, float rightRemainder)
{
RECT clientRect;
GetClientRect(mainWindow,&clientRect);
if(!hasstarted)
{
context->killOGL();
context->init(framehWnd,
context->format);
hasstarted = true;
//Generate a VBO
glGenBuffersARB(1,&BufferVBO);
}
SetWindowPos(framehWnd,NULL,toolWidth,tabHeight,
(static_cast<int>(((clientRect.right - clientRect.left) - toolWidth) - rightRemainder)) + toolWidth,
(static_cast<int>((clientRect.bottom - clientRect.top) - tabHeight - paramHeight)) ,NULL);
int width;
int height;
RECT newwin;
GetClientRect(framehWnd,&newwin);
width = newwin.right - newwin.left;
height = newwin.bottom - newwin.top;
Dimensions.x = width;
Dimensions.y = height;
glViewport(0, 0, width, height);
glShadeModel(GL_SMOOTH);
glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST);
glEnable(GL_POLYGON_SMOOTH);
glEnable(GL_LINE_SMOOTH);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glEnable(GL_MULTISAMPLE_ARB);
glEnable(GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
glLineWidth(2);
glPointSize(5);
}
形状呈现：
void CGlShape::Render()
{
if(!render)
{
return;
}
glColor4f(MainShapeColor.r,MainShapeColor.g,MainShapeColor.b,MainShapeColor.a);
if(Gradient.active)
{
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,Gradient.TextureId);
}
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, ObjectVBOInt);
glVertexPointer(2, GL_FLOAT, 0, (char *) NULL); // Set The Vertex Pointer To The Vertex Buffer
glBindBufferARB(GL_ARRAY_BUFFER_ARB, TextureCoordsVBOInt);
glTexCoordPointer(2, GL_FLOAT, 0, (char *) NULL); // Set The Vertex Pointer To The Vertex Buffer
glDrawArrays(GL_TRIANGLES, 0, ObjectVBOCount);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
glDisable(GL_TEXTURE_2D);
for(int i = 0; i < Contour.size(); ++i)
{
glColor4f(Contour[i].Outline.OutlineColor.r,
Contour[i].Outline.OutlineColor.g,
Contour[i].Outline.OutlineColor.b,
Contour[i].Outline.OutlineColor.a);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, Contour[i].Outline.OutlineVBO);
glVertexPointer(2, GL_FLOAT, 0, (char *) NULL); // Set The Vertex Pointer To The Vertex Buffer
glDrawArrays(GL_TRIANGLES, 0, Contour[i].Outline.OutlineSize);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
}
glDisableClientState(GL_VERTEX_ARRAY);
}
编辑
我成功向S通过0.00001的gltranslation渲染轮廓两次。这有效，但导致透支，我希望我有更好的解决方案。