<jittershader name="Connect_Close_Vertices">
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<description>Default Connect Close Vertices </description>
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<param name="position" type="vec3" state="POSITION" />
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<param name="modelViewProjectionMatrix" type="mat4" state="MODELVIEW_PROJECTION_MATRIX" />
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<param name="color" type="vec4" state="COLOR" />
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<param name="posBuffer" type="int" default="0" />
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<param name="distThreshold" type="float" default="0.1" />
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<language name="glsl" version="1.5">
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<bind param="position" program="vp" />
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<bind param="modelViewProjectionMatrix" program="vp" />
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<bind param="color" program="vp" />
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<bind param="posBuffer" program="vp" />
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<bind param="distThreshold" program="vp" />
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<program name="vp" type="vertex">
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<![CDATA[
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#version 330 core
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uniform mat4 modelViewProjectionMatrix;
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in vec3 position;
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in vec4 color;
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uniform samplerBuffer posBuffer;
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uniform float distThreshold;
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const int arrayLength = 6;
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out jit_PerVertex {
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flat vec4 color;
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flat vec4 closeParticlePosition[arrayLength];
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} jit_out;
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void main() {
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int iterations = 1000;
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gl_Position = modelViewProjectionMatrix * vec4(position, 1.);
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jit_out.color = color;
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// initialize close particles position to this particle position
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for (int i=0; i<arrayLength; i++)
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{
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jit_out.closeParticlePosition[i] = modelViewProjectionMatrix * vec4(position, 1.);
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}
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int counter = 0;
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for (int i=gl_VertexID+1; i<iterations; i++)
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{
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vec3 otherPosition = texelFetch(posBuffer, i).xyz;
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float dist = length(position - otherPosition);
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if (dist < distThreshold && dist > 0.0)
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{
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jit_out.closeParticlePosition[counter] = modelViewProjectionMatrix * vec4(otherPosition, 1.);
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counter++;
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if (counter >= arrayLength)
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{
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break;
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}
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}
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}
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}
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]]>
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</program>
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<program name="gp" type="geometry">
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<![CDATA[
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#version 330 core
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layout (points) in;
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layout (line_strip, max_vertices=12) out;
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const int arrayLength = 6;
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in jit_PerVertex {
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flat vec4 color;
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flat vec4 closeParticlePosition[arrayLength];
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} jit_in[];
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out jit_PerVertex {
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flat vec4 color;
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};
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void main() {
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for (int i = 0; i<arrayLength; i++)
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{
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gl_Position = gl_in[0].gl_Position;
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color = jit_in[0].color;
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EmitVertex();
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gl_Position = jit_in[0].closeParticlePosition[i];
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color = jit_in[0].color;
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EmitVertex();
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EndPrimitive();
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}
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}
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]]>
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</program>
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<program name="fp" type="fragment">
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<![CDATA[
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#version 330 core
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in jit_PerVertex {
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flat vec4 color;
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} jit_in;
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out vec4 color;
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void main() {
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color = jit_in.color;
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// if (length(gl_PointCoord-0.5)>0.5)
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// discard;
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}
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]]>
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</program>
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</language>
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</jittershader>
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