另一个透明对象后面的OpenGL透明对象

Question

我正在尝试渲染草叶。简单的方法是画两个平行的四边形，像这样在中间交叉

问题是要渲染的第一个四边形对于要绘制的下一个草叶来说是不透明的。如果我画A然后B，B不会出现在A后面

这就是我的渲染方式

void drawHighGrass(){
glDisable(GL_LIGHTING);
glClearColor(1.0, 1.0, 1.0, 1.0);
glColor4f(1.0, 1.0, 1.0, 0.95);


glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);


glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texturas[HIGH_GRASS]);

glCullFace(GL_FRONT);

glPushMatrix();
//glTranslatef(1000, 0, 1000);
glScalef(1, 1.5, 1);

glPushMatrix();

glTranslatef(-100 / 2, -10, 0);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(0, 0, 0);
glTexCoord2f(1.0f, 0.0f); glVertex3f(100, 0, 0);
glTexCoord2f(1.0f, 1.0f); glVertex3f(100, 40, 0);
glTexCoord2f(0.0f, 1.0f); glVertex3f(0, 40, 0);
glEnd();

glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(100, 0, 0);
glTexCoord2f(1.0f, 0.0f); glVertex3f(0, 0, 0);
glTexCoord2f(1.0f, 1.0f); glVertex3f(0, 40, 0);
glTexCoord2f(0.0f, 1.0f); glVertex3f(100, 40, 0);
glEnd();
glPopMatrix();

glPushMatrix();
//glTranslatef(1000, 0, 1000);
glTranslatef(0, -10, -100 / 2);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(0, 0, 0);
glTexCoord2f(1.0f, 0.0f); glVertex3f(0, 0, 100);
glTexCoord2f(1.0f, 1.0f); glVertex3f(0, 40, 100);
glTexCoord2f(0.0f, 1.0f); glVertex3f(0, 40, 0);
glEnd();

glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex3f(0, 0, 100);
glTexCoord2f(1.0f, 0.0f); glVertex3f(0, 0, 0);
glTexCoord2f(1.0f, 1.0f); glVertex3f(0, 40, 0);
glTexCoord2f(0.0f, 1.0f); glVertex3f(0, 40, 100);
glEnd();

glPopMatrix();
glPopMatrix();

glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
glEnable(GL_LIGHTING);

glCullFace(GL_BACK);

}

Answer 1

我找到了解决办法：

glAlphaFunc(GL_GREATER, 0.5);
glEnable(GL_ALPHA_TEST);