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Commit 7991dddb authored by amandaghassaei's avatar amandaghassaei
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debugged shader

parent d237a10b
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Showing with 42 additions and 41 deletions
index.html
View file @ 7991dddb
......@@ -97,15 +97,15 @@
<script id="velocityCalcShader" type="x-shader/x-fragment">
precision mediump float;
uniform vec2 u_textureDim;
uniform vec2 u_textureDimEdges;
uniform float u_dt;
uniform sampler2D u_lastPosition;
uniform sampler2D u_lastVelocity;
uniform sampler2D u_originalPosition;
uniform sampler2D u_externalForces;
uniform sampler2D u_mass;
uniform sampler2D u_meta;
uniform sampler2D u_beamK;
uniform sampler2D u_beamD;
uniform sampler2D u_meta;//[beamsIndex, numBeams]
uniform sampler2D u_beamMeta;//[k, d, length, otherNodeIndex]
void main(){
vec2 fragCoord = gl_FragCoord.xy;
......@@ -123,12 +123,17 @@
vec3 originalPosition = texture2D(u_originalPosition, scaledFragCoord).xyz;
vec4 neighborIndices = texture2D(u_meta, scaledFragCoord);
vec4 beamKs = texture2D(u_beamK, scaledFragCoord);
vec4 beamDs = texture2D(u_beamD, scaledFragCoord);
for (int j=0;j<4;j++){
float neighborIndex1D = neighborIndices[j];
if (neighborIndex1D<0.0) continue;//no beam
vec2 meta = texture2D(u_meta, scaledFragCoord).xy;
for (int j=0;j<100;j++){//for all beams
if (j >= int(meta[1])) break;
float beamIndex1D = meta[0]+float(j);
vec2 beamIndex = vec2(mod(beamIndex1D, u_textureDimEdges.x)+0.5, floor(beamIndex1D/u_textureDimEdges.x)+0.5);
vec2 scaledBeamIndex = beamIndex/u_textureDimEdges;
vec4 beamMeta = texture2D(u_beamMeta, scaledBeamIndex);
float neighborIndex1D = beamMeta[3];
vec2 neighborIndex = vec2(mod(neighborIndex1D, u_textureDim.x)+0.5, floor(neighborIndex1D/u_textureDim.x)+0.5);
vec2 scaledNeighborIndex = neighborIndex/u_textureDim;
vec3 neighborLastPosition = texture2D(u_lastPosition, scaledNeighborIndex).xyz;
......@@ -137,10 +142,10 @@
vec3 nominalDist = neighborOriginalPosition-originalPosition;
vec3 deltaP = neighborLastPosition-lastPosition+nominalDist;
// deltaP -= normalize(deltaP)*length(nominalDist);
deltaP -= normalize(deltaP)*length(nominalDist);
vec3 deltaV = neighborLastVelocity-lastVelocity;
vec3 _force = deltaP*beamKs[j] + deltaV*beamDs[j];
vec3 _force = deltaP*beamMeta[0] + deltaV*beamMeta[1];
force += _force;
}
vec3 velocity = force*u_dt/mass.x + lastVelocity;
......
js/dynamicModel.js
View file @ 7991dddb
......@@ -18,9 +18,8 @@ function initDynamicModel(globals){
var lastVelocity;
var externalForces;
var mass;
var meta;
var beamK;
var beamD;
var meta;//[beamsIndex, numBeams]
var beamMeta;//[K, D, length, otherNodeIndex]
function syncNodesAndEdges(){
nodes = globals.model.getNodes();
......@@ -34,18 +33,12 @@ function initDynamicModel(globals){
var programsInited = false;//flag for initial setup
var textureDim = 0;
var textureDimEdges = 0;
syncNodesAndEdges();
initTexturesAndPrograms(globals.gpuMath);
steps = parseInt(setSolveParams());
runSolver();
function averageSubdivide(){
globals.gpuMath.step("averageSubdivide", ["u_lastPosition", "u_originalPosition", "u_meta", "u_mass"], "u_position");
globals.gpuMath.swapTextures("u_position", "u_lastPosition");
globals.gpuMath.step("averageSubdivide", ["u_lastPosition", "u_originalPosition", "u_meta", "u_mass"], "u_position");
globals.gpuMath.swapTextures("u_position", "u_lastPosition");
}
function reset(){
globals.gpuMath.step("zeroTexture", [], "u_position");
globals.gpuMath.step("zeroTexture", [], "u_lastPosition");
......@@ -104,7 +97,7 @@ function initDynamicModel(globals){
var gpuMath = globals.gpuMath;
gpuMath.step("velocityCalc", ["u_lastPosition", "u_lastVelocity", "u_originalPosition", "u_externalForces",
"u_mass", "u_meta", "u_beamK", "u_beamD"], "u_velocity");
"u_mass", "u_meta", "u_beamMeta"], "u_velocity");
gpuMath.step("positionCalc", ["u_velocity", "u_lastPosition", "u_mass"], "u_position");
gpuMath.swapTextures("u_velocity", "u_lastVelocity");
......@@ -175,8 +168,6 @@ function initDynamicModel(globals){
function initTexturesAndPrograms(gpuMath){
textureDim = calcTextureSize(nodes.length);
var vertexShader = document.getElementById("vertexShader").text;
gpuMath.initTextureFromData("u_position", textureDim, textureDim, "FLOAT", position);
......@@ -204,9 +195,9 @@ function initDynamicModel(globals){
gpuMath.setUniformForProgram("velocityCalc", "u_externalForces", 3, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_mass", 4, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_meta", 5, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_beamK", 6, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_beamD", 7, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_beamMeta", 6, "1i");
gpuMath.setUniformForProgram("velocityCalc", "u_textureDim", [textureDim, textureDim], "2f");
gpuMath.setUniformForProgram("velocityCalc", "u_textureDimEdges", [textureDimEdges, textureDimEdges], "2f");
gpuMath.createProgram("packToBytes", vertexShader, document.getElementById("packToBytesShader").text);
gpuMath.initTextureFromData("outputBytes", textureDim*4, textureDim, "UNSIGNED_BYTE", null);
......@@ -232,15 +223,20 @@ function initDynamicModel(globals){
}
function updateMaterials(){
var index = 0;
for (var i=0;i<nodes.length;i++){
meta[4*i] = index;
meta[4*i+1] = nodes[i].numBeams();
for (var j=0;j<nodes[i].beams.length;j++){
var beam = nodes[i].beams[j];
beamK[4*i+j] = beam.getK();
beamD[4*i+j] = beam.getD();
beamMeta[4*index] = beam.getK();
beamMeta[4*index+1] = beam.getD();
beamMeta[4*index+2] = beam.getLength();
beamMeta[4*index+3] = beam.getOtherNode(nodes[i]).getIndex();
index+=1;
}
}
globals.gpuMath.initTextureFromData("u_beamK", textureDim, textureDim, "FLOAT", beamK, true);
globals.gpuMath.initTextureFromData("u_beamD", textureDim, textureDim, "FLOAT", beamD, true);
globals.gpuMath.initTextureFromData("u_beamMeta", textureDimEdges, textureDimEdges, "FLOAT", beamMeta, true);
//recalc dt
if (programsInited) setSolveParams();
}
......@@ -276,6 +272,12 @@ function initDynamicModel(globals){
textureDim = calcTextureSize(nodes.length);
var numEdges = 0;
for (var i=0;i<nodes.length;i++){
numEdges += nodes[i].numBeams();
}
textureDimEdges = calcTextureSize(numEdges);
originalPosition = new Float32Array(textureDim*textureDim*4);
position = new Float32Array(textureDim*textureDim*4);
lastPosition = new Float32Array(textureDim*textureDim*4);
......@@ -283,10 +285,8 @@ function initDynamicModel(globals){
lastVelocity = new Float32Array(textureDim*textureDim*4);
externalForces = new Float32Array(textureDim*textureDim*4);
mass = new Float32Array(textureDim*textureDim*4);
meta = new Float32Array(textureDim*textureDim*4);
beamK = new Float32Array(textureDim*textureDim*4);
beamD = new Float32Array(textureDim*textureDim*4);
meta = new Float32Array(textureDim*textureDim*4);//todo uint16
beamMeta = new Float32Array(textureDimEdges*textureDimEdges*4);
for (var i=0;i<textureDim*textureDim;i++){
mass[4*i+1] = 1;//set all fixed by default
......@@ -294,14 +294,6 @@ function initDynamicModel(globals){
_.each(nodes, function(node, index){
mass[4*index] = node.getSimMass();
meta[4*index] = -1;
meta[4*index+1] = -1;
meta[4*index+2] = -1;
meta[4*index+3] = -1;
_.each(node.beams, function(beam, i){
meta[4*index+i] = beam.getOtherNode(node).getIndex();
});
});
updateOriginalPosition();
......
js/node.js
View file @ 7991dddb
......@@ -93,6 +93,10 @@ Node.prototype.getBeams = function(){
return this.beams;
};
Node.prototype.numBeams = function(){
return this.beams.length;
};
Node.prototype.getIndex = function(){//in nodes array
return this.index;
};
......
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