我的滑动菜单网格的点指示器有一个访问方法。
- (void) visit
{
[super visit];//< Will draw after glPopScene.
BOOL showPagesIndicator = YES;
ccColor4B pagesIndicatorNormalColor_ = ccc4([sud integerForKey:key_int_r], [sud integerForKey:key_int_g], [sud integerForKey:key_int_b], 255);
ccColor4B pagesIndicatorSelectedColor_ = ccc4(255, 255, 255, 255);
if (showPagesIndicator)
{
int totalScreens = iPageCount;
// Prepare Points Array
CGFloat n = (CGFloat)totalScreens; //< Total points count in CGFloat.
CGFloat pY = pageIndicatorPosition.y; //< Points y-coord in parent coord sys.
CGFloat d = may_double(16.0f); //< Distance between points.
CGPoint points[totalScreens];
for (int i=0; i < totalScreens; ++i)
{
CGFloat pX = pageIndicatorPosition.x + d * ( (CGFloat)i - 0.5f*(n-1.0f) );
points[i] = ccp (pX, pY);
}
// Set GL Values
#if COCOS2D_VERSION >= 0x00020000
// ccGLEnable(CC_GL_BLEND);
ccPointSize( may_double(6.0 * CC_CONTENT_SCALE_FACTOR()) );
#define DRAW_4B_FUNC ccDrawColor4B
#else
glEnable(GL_POINT_SMOOTH);
GLboolean blendWasEnabled = glIsEnabled( GL_BLEND );
glEnable(GL_BLEND);
// save the old blending functions
int blend_src = 0;
int blend_dst = 0;
glGetIntegerv( GL_BLEND_SRC, &blend_src );
glGetIntegerv( GL_BLEND_DST, &blend_dst );
glPointSize( may_double(6.0 * CC_CONTENT_SCALE_FACTOR()) );
#define DRAW_4B_FUNC glColor4ub
#endif
ccGLBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
// Draw Gray Points
DRAW_4B_FUNC(pagesIndicatorNormalColor_.r,
pagesIndicatorNormalColor_.g,
pagesIndicatorNormalColor_.b,
pagesIndicatorNormalColor_.a);
ccDrawPoints( points, totalScreens );
// Draw White Point for Selected Page
DRAW_4B_FUNC(pagesIndicatorSelectedColor_.r,
pagesIndicatorSelectedColor_.g,
pagesIndicatorSelectedColor_.b,
pagesIndicatorSelectedColor_.a);
ccDrawPoint(points[iCurrentPage]);
// Restore GL Values
#if COCOS2D_VERSION >= 0x00020000
ccPointSize(1.0f);
#else
glPointSize(1.0f);
glDisable(GL_POINT_SMOOTH);
if (! blendWasEnabled)
glDisable(GL_BLEND);
// always restore the blending functions too
ccGLBlendFunc( blend_src, blend_dst);
// glBlendFunc( blend_src, blend_dst );
#endif
}
}
它适用于我早期的项目,但不适用于 cocos2d v3。对于几乎每个 openGL 语句,例如glPointSize/ccPointSize
and ,我都会收到错误(对 C99 等无效) glColor4ub
。我曾尝试使用 CCDrawNode(OOP 方式),但它仍然不是一对一的翻译。(glGetIntegerv
等)
以下链接是我创建的测试项目(有错误,注意屏幕不可滚动,点指示器不显示(即visit
功能不工作)
https://drive.google.com/file/d/0BzH5x38rukpYaVlWdUJPWW9EYWc/edit?usp=sharing
编辑:我尝试使用 [renderer enqueueMethod:@selector(drawDotIndicators) target:self];
访问代码并将其放入drawDotIndicators
方法中。它也不起作用
(本教程结束:https ://www.makegameswith.us/docs/#!/cocos2d/1.1/customrendering )