티스토리 뷰
void drawSolidPoly( CGPoint *poli, int points, BOOL closePolygon ) { glVertexPointer(2, GL_FLOAT, 0, poli); glEnableClientState(GL_VERTEX_ARRAY); glDrawArrays(GL_TRIANGLE_FAN , 0, points); glDisableClientState(GL_VERTEX_ARRAY); }
Primitive Flag Description
GL_POINTS A point is placed at each vertex.
GL_LINES A line is drawn for every pair of vertices that are given.
GL_LINE_STRIP A continuous set of lines are drawn. After the first
vertex, a line is drawn between every successive vertex
and the vertex before it.
GL_LINE_LOOP This is the same as GL_LINE_STRIP except that the start and end
vertices are connected as well.
GL_TRIANGLES For every triplet of vertices, a triangle is drawn with corners
specified by the coordinates of the vertices.
It begins with v0,v1,v2 then v3,v4,v5 and so on.
GL_TRIANGLE_STRIP After the first 2 vertices, every successive vertex uses the
previous 2 vertices to draw a triangle.
It begins with v0,v1,v2 then v1,v2,v3 then v2,v3,v4 and so on.
GL_TRIANGLE_FAN After the first 2 vertices, every successive vertex uses the
previous vertex and the first vertex to draw a triangle.
This is used to draw cone-like shapes
It begins with v0,v1,v2 then v0,v2,v3 then v0,v3,v4 and so on.
GL_QUADS Draws a series of quadrilaterals (four sided polygons)
beginning with v0,v1,v2,v3 then v4,v5,v6,v7 and so on
GL_QUAD_STRIP Does a series of quadrilaterals beginning with
v0,v1,v3,v2 then v2,v3,v5,v4 then v4,v5,v7,v6 and so on
GL_POLYGON Draws a polygon using the points v0,v1,...,vn
as vertices. n must be at least 3, or nothing is drawn.
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