我想用cocos2d-iphone 2.0画线

Question

想在angrybird中像橡皮筋一样画一条线射小鸟！我使用下面的代码，但没有任何显示，我是新手

-(void)draw
{
    glLineWidth(10.0f);
    GLfloat ver[4] = {_startPoint1.x,_startPoint1.y,_endPoint.x,_endPoint.y};
    glVertexAttribPointer(kCCVertexAttribFlag_Position, 2, GL_FLOAT, GL_FALSE, 0, ver);
    glDrawArrays(GL_LINES, 0, 2);
     ccGLEnableVertexAttribs(kCCVertexAttribFlag_Position|kCCVertexAttribFlag_Color);

}

Answer 1

您可以在访问函数中调用cocos2d提供的内置绘图函数。

#import "CCDrawingPrimitives.h"


-(void) visit{

    [super visit];
    ccDrawLine(ccp(0,100), ccp(320,150));
}

查看如何使用这个好工具绘制平滑线tutorial

Answer 2

(void) draw {

glLineWidth(2.0f); // 设置线宽 glColor4f(1.0f, 0.0f, 0.0f, 1.0f); // 设置颜色 glEnable(GL_LINE_SMOOTH); //把线段反锯齿

glDisable(GL_TEXTURE_2D); glDisableClientState(GL_TEXTURE_COORD_ARRAY); glDisableClientState(GL_COLOR_ARRAY);

GLfloat ver[4] = {_startPoint1.x, _startPoint1.y, _endPoint.x, _endPoint.y}; glVertexPointer(2, GL_FLOAT, 0, ver); glDrawArrays(GL_LINES, 0, 2);

GLfloat ver2[5] = {_startPoint2.x, _startPoint2.y, _endPoint.x, _endPoint.y}; glVertexPointer(2, GL_FLOAT, 0, ver2); glDrawArrays(GL_LINES, 0, 2);

glEnableClientState(GL_COLOR_ARRAY); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnable(GL_TEXTURE_2D);

glDisable(GL_LINE_SMOOTH); }

我想用cocos2d-iphone 2.0画线

I want to use cocos2d-iphone 2.0 to draw a line

iphone

cocos2d-iphone

ios