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[操作系统]OpenGL ES 3.0 点,线,三角形绘制形式总结


OpenGL ES 3.0

顶点

    -1,  1, 0,
-0.5f,  0, 0,
     0, -1, 0,
    -1,  0, 0,
 0.5f,   0, 0,
     1, -1,  0

 

 

顶点设置成了大小20

  public static final String vertex3 =      "#version 300 es \n" +      "uniform mat4 uMVPMatrix;\n"       + "layout(location = 0) in vec3 aPosition;\n"       + "layout(location = 1) in vec2 aTexCoor;\n"       + "out vec2 vTextureCoord;\n"        + "void main() { \n"       + "gl_Position = uMVPMatrix * vec4(aPosition,1);\n"       + "gl_PointSize = 20.0;\n"      + "vTextureCoord = aTexCoor;\n"        + "}\n" 

 

  public static final String fragment4 = "#version 300 es \n" +        "precision mediump float;\n"      + "in vec2 vTextureCoord;\n"      + "out vec4 v_color;\n"     + "void main() { \n"      + "vec2 coord = vTextureCoord;\n"      + "v_color = vec4(1.0,1.0,1.0,0.0); \n"      + "}\n"      ; 

 

GLES30.glDrawArrays 绘制形状

 

GL_POINTS  画点

 

 

GL_LINES    画线,2点连线

 

 

GL_LINE_LOOP  让线循环闭合

 

 

 

GL_LINE_STRIP 绘制线并不闭合

 

GL_TRIANGLES 绘制三角形,三个点绘制一个

 

 

 

GL_TRIANGLE_STRIP  每个顶点和其它2个顶点连接形成三角形

 

 

 

GL_TRIANGLE_FAN  绘制三角形扇,可以绘制圆之类的形状