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working line coincidence

master
howard 2021-03-21 18:57:08 -07:00
parent cf69fee366
commit 84466424aa
5 changed files with 75 additions and 280 deletions
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2
dist/bundle.js vendored
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dist/solver.wasm vendored
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57
src/Sketcher.js
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@ -148,12 +148,13 @@ export class Sketcher extends THREE.Group {
moveLinePt(ptIdx, absPos) {
this.ptsArr[ptIdx].geometry.attributes.position.set(absPos);
this.ptsArr[ptIdx].geometry.attributes.position.needsUpdate = true;
this.solve()
// this.ptsArr[ptIdx].geometry.attributes.position.needsUpdate = true;
const lineIdx = Math.floor(ptIdx / 2)
const endPtIdx = (ptIdx % 2) * 3
this.linesArr[lineIdx].geometry.attributes.position.set(absPos, endPtIdx)
this.linesArr[lineIdx].geometry.attributes.position.needsUpdate = true;
// const lineIdx = Math.floor(ptIdx / 2)
// const endPtIdx = (ptIdx % 2) * 3
// this.linesArr[lineIdx].geometry.attributes.position.set(absPos, endPtIdx)
// this.linesArr[lineIdx].geometry.attributes.position.needsUpdate = true;
}
grabEnd() {
@ -242,6 +243,7 @@ export class Sketcher extends THREE.Group {
move(e) {
const mouseLoc = this.getLocation(e);
this.lineGeom.attributes.position.set(mouseLoc, 3)
this.lineGeom.attributes.position.needsUpdate = true;
this.p2Geom.attributes.position.set(mouseLoc);
this.p2Geom.attributes.position.needsUpdate = true;
@ -259,29 +261,48 @@ export class Sketcher extends THREE.Group {
}
solve() {
// const linesBuf = new Float32Array(this.linesArr.length * 4)
// const xyOnly = [0,1,3,4];
// let p = 0
// for (let i = 0; i < this.linesArr.length; i++) {
// for (let j of xyOnly) {
// linesBuf[p++] = this.linesArr[i].geometry.attributes.position.array[j]
// }
// }
let ptsBuf = new Float32Array(this.ptsArr.length * 2)
for (let i = 0, p = 0; i < this.ptsArr.length; i++) {
for (let j = 0; j < 2; j++) {
ptsBuf[p++] = this.ptsArr[i].geometry.attributes.position.array[j]
}
ptsBuf[p++] = this.ptsArr[i].geometry.attributes.position.array[0]
ptsBuf[p++] = this.ptsArr[i].geometry.attributes.position.array[1]
}
buffer = Module._malloc(ptsBuf.length * ptsBuf.BYTES_PER_ELEMENT)
Module.HEAPF32.set(ptsBuf, buffer >> 2)
Module["_solver"](this.ptsArr.length / 2, buffer)
Module["_solver"](this.ptsArr.length/2, buffer)
let ptr = buffer >> 2;
for (let i = 0; i < ptsBuf.length; i += 4) {
const pt1_pos = this.ptsArr[i >> 1].geometry.attributes.position;
const pt2_pos = this.ptsArr[(i >> 1) + 1].geometry.attributes.position;
const line_pos = this.linesArr[i >> 2].geometry.attributes.position;
pt1_pos.array[0] = Module.HEAPF32[ptr]
line_pos.array[0] = Module.HEAPF32[ptr++]
pt1_pos.array[1] = Module.HEAPF32[ptr]
line_pos.array[1] = Module.HEAPF32[ptr++]
pt2_pos.array[0] = Module.HEAPF32[ptr]
line_pos.array[3] = Module.HEAPF32[ptr++]
pt2_pos.array[1] = Module.HEAPF32[ptr]
line_pos.array[4] = Module.HEAPF32[ptr++]
pt1_pos.needsUpdate = true;
pt2_pos.needsUpdate = true;
line_pos.needsUpdate = true;
}
this.dispatchEvent({ type: 'change' })
Module._free(buffer)
}
}

6
wasm/notes
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@ -136,3 +136,9 @@ int solver(int nLines, float *ptr)
sys.params = sys.constraints = sys.entities = 0;
return 0;
}

280
wasm/solver.c
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@ -32,239 +32,10 @@ static void *CheckMalloc(size_t n)
* An example of a constraint in 3d. We create a single group, with some
* entities and constraints.
*---------------------------------------------------------------------------*/
void Example3d()
{
/* This will contain a single group, which will arbitrarily number 1. */
Slvs_hGroup g = 1;
/* A point, initially at (x y z) = (10 10 10) */
sys.param[sys.params++] = Slvs_MakeParam(1, g, 10.0);
sys.param[sys.params++] = Slvs_MakeParam(2, g, 10.0);
sys.param[sys.params++] = Slvs_MakeParam(3, g, 10.0);
sys.entity[sys.entities++] = Slvs_MakePoint3d(101, g, 1, 2, 3);
/* and a second point at (20 20 20) */
sys.param[sys.params++] = Slvs_MakeParam(4, g, 20.0);
sys.param[sys.params++] = Slvs_MakeParam(5, g, 20.0);
sys.param[sys.params++] = Slvs_MakeParam(6, g, 20.0);
sys.entity[sys.entities++] = Slvs_MakePoint3d(102, g, 4, 5, 6);
/* and a line segment connecting them. */
sys.entity[sys.entities++] = Slvs_MakeLineSegment(200, g,
SLVS_FREE_IN_3D, 101, 102);
/* The distance between the points should be 30.0 units. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
1, g,
SLVS_C_PT_PT_DISTANCE,
SLVS_FREE_IN_3D,
30.0,
101, 102, 0, 0);
/* Let's tell the solver to keep the second point as close to constant
* as possible, instead moving the first point. */
// sys.dragged[0] = 4;
// sys.dragged[1] = 5;
// sys.dragged[2] = 6;
/* Now that we have written our system, we solve. */
Slvs_Solve(&sys, g);
if (sys.result == SLVS_RESULT_OKAY)
{
printf("okay; now at (%.3f %.3f %.3f)\n"
" (%.3f %.3f %.3f)\n",
sys.param[0].val, sys.param[1].val, sys.param[2].val,
sys.param[3].val, sys.param[4].val, sys.param[5].val);
printf("%d DOF\n", sys.dof);
}
else
{
printf("solve failed");
}
}
/*-----------------------------------------------------------------------------
* An example of a constraint in 2d. In our first group, we create a workplane
* along the reference frame's xy plane. In a second group, we create some
* entities in that group and dimension them.
*---------------------------------------------------------------------------*/
void Example2d(float xx)
{
Slvs_hGroup g;
double qw, qx, qy, qz;
g = 1;
/* First, we create our workplane. Its origin corresponds to the origin
* of our base frame (x y z) = (0 0 0) */
sys.param[sys.params++] = Slvs_MakeParam(1, g, 0.0);
sys.param[sys.params++] = Slvs_MakeParam(2, g, 0.0);
sys.param[sys.params++] = Slvs_MakeParam(3, g, 0.0);
sys.entity[sys.entities++] = Slvs_MakePoint3d(101, g, 1, 2, 3);
/* and it is parallel to the xy plane, so it has basis vectors (1 0 0)
* and (0 1 0). */
Slvs_MakeQuaternion(1, 0, 0,
0, 1, 0, &qw, &qx, &qy, &qz);
sys.param[sys.params++] = Slvs_MakeParam(4, g, qw);
sys.param[sys.params++] = Slvs_MakeParam(5, g, qx);
sys.param[sys.params++] = Slvs_MakeParam(6, g, qy);
sys.param[sys.params++] = Slvs_MakeParam(7, g, qz);
sys.entity[sys.entities++] = Slvs_MakeNormal3d(102, g, 4, 5, 6, 7);
sys.entity[sys.entities++] = Slvs_MakeWorkplane(200, g, 101, 102);
/* Now create a second group. We'll solve group 2, while leaving group 1
* constant; so the workplane that we've created will be locked down,
* and the solver can't move it. */
g = 2;
/* These points are represented by their coordinates (u v) within the
* workplane, so they need only two parameters each. */
sys.param[sys.params++] = Slvs_MakeParam(11, g, 10.0);
sys.param[sys.params++] = Slvs_MakeParam(12, g, 20.0);
sys.entity[sys.entities++] = Slvs_MakePoint2d(301, g, 200, 11, 12);
sys.param[sys.params++] = Slvs_MakeParam(13, g, 20.0);
sys.param[sys.params++] = Slvs_MakeParam(14, g, 10.0);
sys.entity[sys.entities++] = Slvs_MakePoint2d(302, g, 200, 13, 14);
/* And we create a line segment with those endpoints. */
sys.entity[sys.entities++] = Slvs_MakeLineSegment(400, g,
200, 301, 302);
/* Now three more points. */
sys.param[sys.params++] = Slvs_MakeParam(15, g, 110.0);
sys.param[sys.params++] = Slvs_MakeParam(16, g, 120.0);
sys.entity[sys.entities++] = Slvs_MakePoint2d(303, g, 200, 15, 16);
sys.param[sys.params++] = Slvs_MakeParam(17, g, 120.0);
sys.param[sys.params++] = Slvs_MakeParam(18, g, 110.0);
sys.entity[sys.entities++] = Slvs_MakePoint2d(304, g, 200, 17, 18);
sys.param[sys.params++] = Slvs_MakeParam(19, g, 115.0);
sys.param[sys.params++] = Slvs_MakeParam(20, g, xx);
sys.entity[sys.entities++] = Slvs_MakePoint2d(305, g, 200, 19, 20);
/* And arc, centered at point 303, starting at point 304, ending at
* point 305. */
sys.entity[sys.entities++] = Slvs_MakeArcOfCircle(401, g, 200, 102,
303, 304, 305);
/* Now one more point, and a distance */
sys.param[sys.params++] = Slvs_MakeParam(21, g, 200.0);
sys.param[sys.params++] = Slvs_MakeParam(22, g, 200.0);
sys.entity[sys.entities++] = Slvs_MakePoint2d(306, g, 200, 21, 22);
sys.param[sys.params++] = Slvs_MakeParam(23, g, 30.0);
sys.entity[sys.entities++] = Slvs_MakeDistance(307, g, 200, 23);
/* And a complete circle, centered at point 306 with radius equal to
* distance 307. The normal is 102, the same as our workplane. */
sys.entity[sys.entities++] = Slvs_MakeCircle(402, g, 200,
306, 102, 307);
/* The length of our line segment is 30.0 units. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
1, g,
SLVS_C_PT_PT_DISTANCE,
200,
30.0,
301, 302, 0, 0);
/* And the distance from our line segment to the origin is 10.0 units. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
2, g,
SLVS_C_PT_LINE_DISTANCE,
200,
10.0,
101, 0, 400, 0);
/* And the line segment is vertical. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
3, g,
SLVS_C_VERTICAL,
200,
0.0,
0, 0, 400, 0);
/* And the distance from one endpoint to the origin is 15.0 units. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
4, g,
SLVS_C_PT_PT_DISTANCE,
200,
15.0,
301, 101, 0, 0);
#if 0
/* And same for the other endpoint; so if you add this constraint then
* the sketch is overconstrained and will signal an error. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
5, g,
SLVS_C_PT_PT_DISTANCE,
200,
18.0,
302, 101, 0, 0);
#endif /* 0 */
/* The arc and the circle have equal radius. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
6, g,
SLVS_C_EQUAL_RADIUS,
200,
0.0,
0, 0, 401, 402);
/* The arc has radius 17.0 units. */
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
7, g,
SLVS_C_DIAMETER,
200,
17.0 * 2,
0, 0, 401, 0);
/* If the solver fails, then ask it to report which constraints caused
* the problem. */
sys.calculateFaileds = 1;
/* And solve. */
Slvs_Solve(&sys, g);
if (sys.result == SLVS_RESULT_OKAY)
{
printf("solved okay\n");
printf("line from (%.3f %.3f) to (%.3f %.3f)\n",
sys.param[7].val, sys.param[8].val,
sys.param[9].val, sys.param[10].val);
printf("arc center (%.3f %.3f) start (%.3f %.3f) finish (%.3f %.3f)\n",
sys.param[11].val, sys.param[12].val,
sys.param[13].val, sys.param[14].val,
sys.param[15].val, sys.param[16].val);
printf("circle center (%.3f %.3f) radius %.3f\n",
sys.param[17].val, sys.param[18].val,
sys.param[19].val);
printf("%d DOF\n", sys.dof);
}
else
{
int i;
printf("solve failed: problematic constraints are:");
for (i = 0; i < sys.faileds; i++)
{
printf(" %d", sys.failed[i]);
}
printf("\n");
if (sys.result == SLVS_RESULT_INCONSISTENT)
{
printf("system inconsistent\n");
}
else
{
printf("system nonconvergent\n");
}
}
}
int solver(int nLines, float *ptr)
{
// for (int i=0; i<nLines ;i++) {
// printf("%f\n",*ptr++);
// }
float *buf_pt_start = ptr;
Slvs_hGroup g;
@ -296,50 +67,47 @@ int solver(int nLines, float *ptr)
/* These points are represented by their coordinates (u v) within the
* workplane, so they need only two parameters each. */
int ptStart = sys.params;
int p_start = sys.params;
sys.param[sys.params++] = Slvs_MakeParam(11, g, (float)*ptr++);
sys.param[sys.params++] = Slvs_MakeParam(12, g, (float)*ptr++);
sys.entity[sys.entities++] = Slvs_MakePoint2d(301, g, 200, 11, 12);
Slvs_hParam ph = 11, ph_s = 11;
Slvs_hParam vh = 301, vh_s = 301;
Slvs_hParam lh = 400, lh_s = 400;
sys.param[sys.params++] = Slvs_MakeParam(13, g, (float)*ptr++);
sys.param[sys.params++] = Slvs_MakeParam(14, g, (float)*ptr++);
sys.entity[sys.entities++] = Slvs_MakePoint2d(302, g, 200, 13, 14);
Slvs_hParam con_id = 1;
/* And we create a line segment with those endpoints. */
sys.entity[sys.entities++] = Slvs_MakeLineSegment(400, g,
200, 301, 302);
for (int i = 0; i < nLines * 2; i++)
{
sys.param[sys.params++] = Slvs_MakeParam(15, g, (float)*ptr++);
sys.param[sys.params++] = Slvs_MakeParam(16, g, (float)*ptr++);
sys.entity[sys.entities++] = Slvs_MakePoint2d(303, g, 200, 15, 16);
sys.param[sys.params++] = Slvs_MakeParam(17, g, (float)*ptr++);
sys.param[sys.params++] = Slvs_MakeParam(18, g, (float)*ptr++);
sys.entity[sys.entities++] = Slvs_MakePoint2d(304, g, 200, 17, 18);
sys.entity[sys.entities++] = Slvs_MakeLineSegment(401, g,
200, 303, 304);
sys.param[sys.params++] = Slvs_MakeParam(ph++, g, (float)*ptr++);
sys.param[sys.params++] = Slvs_MakeParam(ph++, g, (float)*ptr++);
sys.entity[sys.entities++] = Slvs_MakePoint2d(vh++, g, 200, ph - 1, ph - 2);
if (i % 2 == 1)
{
sys.entity[sys.entities++] = Slvs_MakeLineSegment(lh++, g,
200, vh - 1, vh - 2);
}
else if (i > 0)
{
sys.constraint[sys.constraints++] = Slvs_MakeConstraint(
421, g,
con_id++, g,
SLVS_C_POINTS_COINCIDENT,
200,
0.0,
302, 303, 0, 0);
vh - 1, vh - 2, 0, 0);
}
}
/* And solve. */
Slvs_Solve(&sys, g);
// printf("%i,wtf\n", sys.result);
if (sys.result == SLVS_RESULT_OKAY)
{
printf("solved okay\n");
// printf("solved okay\n");
for (int i = 0; i < nLines * 4; i++)
{
// *buf_pt_start++ = (float)sys.param[ptStart++].val;
printf("%f\n", sys.param[ptStart++].val);
*buf_pt_start++ = (float)sys.param[p_start++].val;
}
}
else