77 lines
2.3 KiB
Plaintext
77 lines
2.3 KiB
Plaintext
shader_type spatial;
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uniform vec4 metaBallA;
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uniform vec4 metaBallB;
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uniform vec4 metaBallC;
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uniform vec4 metaBallD;
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uniform vec4 metaBallE;
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uniform vec4 metaBallF;
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uniform float maxReach = 2;
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uniform float metaSize = 1;
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uniform float maxInfluence = 0.1;
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uniform float dotInfluence:hint_range(0.0,1.0) = 0.1;
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uniform sampler2D dotInfluenceCurve;
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uniform float pointVSdirectionalAttraction:hint_range(0.0,1.0) = 0.5;
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uniform sampler2D curve;
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vec3 getInfluence( vec3 position, vec3 normal, vec4 metaBall, vec3 ownCenter )
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{
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vec3 metaPosition = metaBall.xyz;
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vec3 centerTowardsMeta = metaPosition - ownCenter;
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vec3 direction = length( centerTowardsMeta ) == 0.0 ? vec3( 0, 0, 0 ) : normalize( centerTowardsMeta );
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vec3 towardsMeta = position - metaPosition;
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float distance = length( towardsMeta );
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vec3 directectedMetaPosition = position + direction * distance;
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vec3 influencePosition = mix( metaPosition, directectedMetaPosition, pointVSdirectionalAttraction );
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float dotProduct = max( 0, dot( normal, normalize( -towardsMeta ) ) );
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dotProduct = texture( dotInfluenceCurve, vec2( dotProduct, 0.0 ) ).r;
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float sd = distance - metaSize;
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sd = sd/maxReach;
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sd = clamp( sd, 0.0, 1.0 );
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float amount = 1.0 - texture( curve, vec2( sd, 0.0 ) ).r;
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vec3 influence = mix( influencePosition, position, amount ) - position;
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//influence = vec3( 0, 0, 0 );
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return influence * ( mix( 1.0, dotProduct, dotInfluence ) );
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}
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void vertex()
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{
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vec3 influence = vec3( 0, 0, 0 );
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vec3 worldPosition = ( MODEL_MATRIX * vec4( VERTEX, 1.0 ) ).xyz;
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vec3 worldNormal = NORMAL;
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vec3 ownCenter = ( MODEL_MATRIX * vec4( 0.00000, 0.00000, 0.00000, 1.0 ) ).xyz;
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influence += getInfluence( worldPosition, worldNormal, metaBallA, ownCenter );
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influence += getInfluence( worldPosition, worldNormal, metaBallB, ownCenter );
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influence += getInfluence( worldPosition, worldNormal, metaBallC, ownCenter );
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influence += getInfluence( worldPosition, worldNormal, metaBallD, ownCenter );
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influence += getInfluence( worldPosition, worldNormal, metaBallE, ownCenter );
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influence += getInfluence( worldPosition, worldNormal, metaBallF, ownCenter );
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worldPosition += influence * maxInfluence;
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VERTEX = ( inverse( MODEL_MATRIX ) * vec4( worldPosition, 1.0 ) ).xyz;
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}
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void fragment()
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{
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}
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void light()
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{
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}
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