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Checking the line and point shaders back in

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codeanticode
2012-02-12 01:27:16 +00:00
parent 5ea73a1c41
commit 530c28a5f5
4 changed files with 168 additions and 0 deletions
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java/libraries/opengl/src/processing/opengl/LineShaderFrag.glsl
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/*
Part of the Processing project - http://processing.org
Copyright (c) 2011 Andres Colubri
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
varying vec4 vertColor;
void main() {
gl_FragColor = vertColor;
}
java/libraries/opengl/src/processing/opengl/LineShaderVert.glsl
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/*
Part of the Processing project - http://processing.org
Copyright (c) 2011 Andres Colubri
Based on glsl code from the dpix library:
http://gfx.cs.princeton.edu/proj/dpix/
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
uniform mat4 modelviewMatrix;
uniform mat4 projectionMatrix;
uniform vec4 viewport;
uniform int perspective;
attribute vec4 inVertex;
attribute vec4 inColor;
attribute vec4 inDirWidth;
varying vec4 vertColor;
vec3 clipToWindow(vec4 clip, vec4 viewport) {
vec3 post_div = clip.xyz / clip.w;
vec2 xypos = (post_div.xy + vec2(1.0, 1.0)) * 0.5 * viewport.zw;
return vec3(xypos, post_div.z * 0.5 + 0.5);
}
vec4 windowToClipVector(vec2 window, vec4 viewport, float clip_w) {
vec2 xypos = (window / viewport.zw) * 2.0;
return vec4(xypos, 0.0, 0.0) * clip_w;
}
void main() {
vec4 pos_p = inVertex;
vec4 pos_q = vec4(inDirWidth.xyz, 1);
vec4 v_p = modelviewMatrix * pos_p;
vec4 clip_p = projectionMatrix * v_p;
vec4 v_q = modelviewMatrix * pos_q;
vec4 clip_q = projectionMatrix * v_q;
vec3 window_p = clipToWindow(clip_p, viewport);
vec3 window_q = clipToWindow(clip_q, viewport);
vec3 tangent = window_q - window_p;
float segment_length = length(tangent.xy);
vec2 perp = normalize(vec2(-tangent.y, tangent.x));
float thickness = inDirWidth.w;
vec2 window_offset = perp * thickness;
if (0 < perspective) {
// Perspective correction (lines will look thiner as they move away
// from the view position).
gl_Position.xy = clip_p.xy + window_offset.xy;
gl_Position.zw = clip_p.zw;
} else {
// No perspective correction.
float clip_p_w = clip_p.w;
vec4 offset_p = windowToClipVector(window_offset, viewport, clip_p_w);
gl_Position = clip_p + offset_p;
}
vertColor = inColor;
}
java/libraries/opengl/src/processing/opengl/PointShaderFrag.glsl
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/*
Part of the Processing project - http://processing.org
Copyright (c) 2011 Andres Colubri
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
varying vec4 vertColor;
void main() {
gl_FragColor = vertColor;
}
java/libraries/opengl/src/processing/opengl/PointShaderVert.glsl
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/*
Part of the Processing project - http://processing.org
Copyright (c) 2011 Andres Colubri
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
uniform mat4 projectionMatrix;
uniform mat4 modelviewMatrix;
attribute vec4 inVertex;
attribute vec4 inColor;
attribute vec2 inSize;
varying vec4 vertColor;
void main() {
vec4 pos = modelviewMatrix * inVertex;
pos.xy += inSize.xy;
gl_Position = projectionMatrix * pos;
vertColor = inColor;
}