6d2c2aecff
There are two main reasons to desire an OpenGL 2 renderer:
1. Compatibility. The compatibility profile, ironically, does not
offer a lot of compatibility, and our OpenGL 1 renderer will not
run on Android, iOS, or WebGL.
2. Performance. The immediate mode does not scale, and in fact
becomes very slow with only a moderate amount of lines on screen,
and only a somewhat large amount of triangles.
This commit implements a basic OpenGL 2 renderer that uses only
features from the (OpenGL 3.2) core profile. It is not yet faster
than the OpenGL 1 renderer, primarily because it uses a lot of small
draw calls.
This commit uses OpenGL 2 on Linux and Mac OS X directly (i.e. links
to the GL symbols from version 2+); on Windows this is impossible
with the default drivers, so for now OpenGL 1 is still used there.
16 lines
392 B
GLSL
16 lines
392 B
GLSL
//-----------------------------------------------------------------------------
|
|
// SolveSpace Mesh rendering shader
|
|
//
|
|
// Copyright 2016 Aleksey Egorov
|
|
//-----------------------------------------------------------------------------
|
|
#version 120
|
|
|
|
attribute vec3 pos;
|
|
|
|
uniform mat4 modelview;
|
|
uniform mat4 projection;
|
|
|
|
void main() {
|
|
gl_Position = projection * modelview * vec4(pos, 1.0);
|
|
}
|