As a beginner in the world of three.js, I'm currently tackling the challenge of incorporating 1000 particles, each unique in size and color. The current roadblock I'm facing is that all particles end up the same color and size when using a ParticleSystem. Creating a separate ParticleSystem for each individual particle seems highly inefficient. Is there a more streamlined approach to solve this issue?
In my opinion, the most effective approach involves crafting a personalized shader material. By utilizing attributes, you can introduce unique properties to each particle. Here is a glimpse of how your shader code could be structured:
Vertex shader:
attribute vec3 customizedColor;
attribute float customizedSize;
varying vec3 vColor;
void main()
{
vColor = customizedColor; // assigns color to vertex for later use in fragment shader
vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );
gl_PointSize = customizedSize * ( 300.0 / length( mvPosition.xyz ) );
gl_Position = projectionMatrix * mvPosition;
}
Fragment shader:
uniform sampler2D texture;
varying vec3 vColor; // colors assigned to vertices by vertex shader
void main()
{
gl_FragColor = vec4( vColor, 1.0 ); // calculates color for particle
gl_FragColor = gl_FragColor * texture2D( texture, gl_PointCoord ); // sets particle texture to specified color
}
To see a similar interactive demonstration, visit:
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