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implement most of the library!

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cosmonaut 2021-09-22 17:28:47 -07:00
parent 9c522e8447
commit 40b3a6596d
4 changed files with 524 additions and 129 deletions
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2
.gitignore vendored Normal file
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@ -0,0 +1,2 @@
visualc/.vs
visualc/x64

548
src/Silkworm.c
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@ -27,11 +27,45 @@
#include "Silkworm.h" #include "Silkworm.h"
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
typedef struct Silkworm_Color
{
uint8_t r;
uint8_t g;
uint8_t b;
uint8_t a;
} Silkworm_Color;
typedef struct Silkworm_Context typedef struct Silkworm_Context
{ {
Silkworm_Group **groups; Silkworm_Node** nodes;
uint32_t groupCount; uint32_t nodeCount;
Silkworm_Link** links;
uint32_t linkCount;
Silkworm_Cloth** cloths;
uint32_t clothCount;
uint64_t* nodeIndicesToDestroy;
uint32_t nodeIndicesToDestroyCount;
uint64_t* linkIndicesToDestroy;
uint32_t linkIndicesToDestroyCount;
uint64_t* nodeIndexStack;
uint32_t nodeIndexStackCount;
uint64_t* linkIndexStack;
uint32_t linkIndexStackCount;
float gravity;
float xBound;
float yBound;
uint32_t clothDensity;
uint8_t* currentBufferAddress; /* GM doesnt let you pass more than 4 arguments with different types lol */
} Silkworm_Context; } Silkworm_Context;
static Silkworm_Context *context = NULL; static Silkworm_Context *context = NULL;
@ -42,155 +76,485 @@ void Silkworm_Init()
{ {
context = malloc(sizeof(Silkworm_Context)); context = malloc(sizeof(Silkworm_Context));
context->groups = NULL; context->nodes = NULL;
context->groupCount = 0; context->nodeCount = 0;
context->links = NULL;
context->linkCount = 0;
context->nodeIndicesToDestroy = NULL;
context->nodeIndicesToDestroyCount = 0;
context->linkIndicesToDestroy = NULL;
context->linkIndicesToDestroyCount = 0;
context->nodeIndexStack = NULL;
context->nodeIndexStackCount = 0;
context->linkIndexStack = NULL;
context->linkIndexStackCount = 0;
context->cloths = NULL;
context->clothCount = 0;
context->gravity = 200;
context->xBound = 1000;
context->yBound = 1000;
context->clothDensity = 4;
} }
void Silkworm_Update() void Silkworm_Update(double deltaTime)
{ {
int32_t i, j, iteration; uint32_t i, j;
Silkworm_Group *group;
Silkworm_Link *link; Silkworm_Link *link;
Silkworm_Node *node;
for (iteration = 0; iteration < CONSTRAINT_ITERATION_COUNT; iteration += 1) float delta = (float)deltaTime;
for (i = 0; i < CONSTRAINT_ITERATION_COUNT; i += 1)
{ {
for (i = 0; i < context->groupCount; i += 1) for (j = 0; j < context->linkCount; j += 1)
{ {
group = context->groups[i]; link = context->links[j];
for (j = 0; j < group->linkCount; j += 1) if (link != NULL)
{ {
link = group->links[j]; float diffX = link->a->position.x - link->b->position.x;
float diffY = link->a->position.y - link->b->position.y;
float d = (float)sqrt(diffX * diffX + diffY * diffY);
double diffX = link->a->position.x - link->b->position.y; float difference = (link->distance - d) / d;
double diffY = link->a->position.y - link->b->position.y;
double d = sqrt(diffX * diffX + diffY * diffY);
double difference = (link->distance - d) / d; float translateX = diffX * 0.5f * difference;
float translateY = diffY * 0.5f * difference;
double translateX = diffX * 0.5 * difference; float distanceMoved = (float)sqrt(translateX * translateX + translateY * translateY);
double translateY = diffY * 0.5 * difference;
double distanceMoved = sqrt(translateX * translateX + translateY * translateY); if (distanceMoved > link->tearThreshold)
{
context->linkIndicesToDestroy = realloc(context->linkIndicesToDestroy, sizeof(uint64_t) * (context->linkIndicesToDestroyCount + 1));
context->linkIndicesToDestroy[context->linkIndicesToDestroyCount] = link->id;
context->linkIndicesToDestroyCount += 1;
}
else
{
if (!link->a->pinned)
{
link->a->position.x += translateX;
link->a->position.y += translateY;
}
if (!link->b->pinned)
{
link->b->position.x -= translateX;
link->b->position.y -= translateY;
} }
} }
} }
}
}
for (j = 0; j < context->nodeCount; j += 1)
{
node = context->nodes[j];
if (node != NULL)
{
if (!node->pinned)
{
float velocityX = (node->position.x - node->previousPosition.x) * node->friction;
float velocityY = (node->position.y - node->previousPosition.y) * node->friction;
float accelerationX = node->acceleration.x * delta * delta;
float accelerationY = (node->acceleration.y + node->mass * context->gravity) * delta * delta;
node->previousPosition.x = node->position.x;
node->previousPosition.y = node->position.y;
node->position.x += velocityX + accelerationX;
node->position.y += velocityY + accelerationY;
node->velocity.x = velocityX * delta;
node->velocity.y = velocityY * delta;
if (fabs(node->position.x) > context->xBound || fabs(node->position.x) > context->yBound)
{
context->nodeIndicesToDestroy = realloc(context->nodeIndicesToDestroy, sizeof(uint64_t) * (context->nodeIndicesToDestroyCount + 1));
context->nodeIndicesToDestroy[context->nodeIndicesToDestroyCount] = node->id;
context->nodeIndicesToDestroyCount += 1;
}
}
}
}
for (j = 0; j < context->nodeIndicesToDestroyCount; j += 1)
{
uint64_t nodeIndex = context->nodeIndicesToDestroy[j];
free(context->nodes[nodeIndex]);
context->nodes[nodeIndex] = NULL;
context->nodeIndexStack = realloc(context->nodeIndexStack, sizeof(uint64_t) * (context->nodeIndexStackCount + 1));
context->nodeIndexStack[context->nodeIndexStackCount] = nodeIndex;
context->nodeIndexStackCount += 1;
}
for (j = 0; j < context->linkIndicesToDestroyCount; j += 1)
{
uint64_t linkIndex = context->linkIndicesToDestroy[j];
free(context->links[linkIndex]);
context->links[linkIndex] = NULL;
context->linkIndexStack = realloc(context->linkIndexStack, sizeof(uint64_t) * (context->linkIndexStackCount + 1));
context->linkIndexStack[context->linkIndexStackCount] = linkIndex;
context->linkIndexStackCount += 1;
}
context->nodeIndicesToDestroyCount = 0;
context->linkIndicesToDestroyCount = 0;
} }
double Silkworm_CreateGroup() static inline Silkworm_Node* LookupNode(double nodeId)
{ {
context->groups = realloc(context->groups, sizeof(Silkworm_Group*) * (context->groupCount + 1)); return context->nodes[(uint64_t)nodeId];
Silkworm_Group* group = malloc(sizeof(Silkworm_Group));
group->nodes = NULL;
group->nodeCount = 0;
group->links = NULL;
group->linkCount = 0;
context->groups[context->groupCount] = group;
context->groupCount += 1;
group->id.i = context->groupCount;
return group->id.d;
} }
static inline Silkworm_Group* LookupGroup(double groupId) static inline Silkworm_Cloth* LookupCloth(double clothId)
{ {
Silkworm_ID gId; return context->cloths[(uint64_t)clothId];
gId.d = groupId;
return context->groups[gId.i];
} }
static inline Silkworm_Node* LookupNode(double groupId, double nodeId) double Silkworm_CreateNode(double xPosition, double yPosition, double mass, double friction, double radius, double pushFactor)
{ {
Silkworm_ID nId; Silkworm_Node* node = malloc(sizeof(Silkworm_Node));
nId.d = nodeId; uint64_t id;
return LookupGroup(groupId)->nodes[nId.i]; if (context->nodeIndexStackCount > 0)
} {
id = context->nodeIndexStack[context->nodeIndexStackCount - 1];
context->nodeIndexStack = realloc(context->nodeIndexStack, sizeof(uint64_t) * (context->nodeIndexStackCount - 1));
context->nodeIndexStackCount -= 1;
double Silkworm_CreateNode(double groupId, double xPosition, double yPosition, double mass, double friction, double radius, double pushFactor) context->nodes[id] = node;
{ }
Silkworm_Group *group = LookupGroup(groupId); else
{
id = context->nodeCount;
Silkworm_ID nodeId; context->nodes = realloc(context->nodes, sizeof(Silkworm_Node*) * (context->nodeCount + 1));
nodeId.i = group->nodeCount; context->nodes[context->nodeCount] = node;
context->nodeCount += 1;
}
Silkworm_Node *node = malloc(sizeof(Silkworm_Node)); node->id = id;
node->id = nodeId; node->position.x = (float)xPosition;
node->position.x = xPosition; node->position.y = (float)yPosition;
node->position.y = yPosition; node->previousPosition.x = (float)xPosition;
node->previousPosition.x = xPosition; node->previousPosition.y = (float)yPosition;
node->previousPosition.y = yPosition;
node->velocity.x = 0; node->velocity.x = 0;
node->velocity.y = 0; node->velocity.y = 0;
node->acceleration.x = 0; node->acceleration.x = 0;
node->acceleration.y = 0; node->acceleration.y = 0;
node->mass = mass; node->mass = (float)mass;
node->friction = friction; node->friction = (float)friction;
node->radius = radius; node->radius = (float)radius;
node->pushFactor = pushFactor; node->pushFactor = (float)pushFactor;
node->pinned = false; node->pinned = false;
node->destroyable = false; node->destroyable = false;
group->nodes = realloc(group->nodes, sizeof(Silkworm_Node*) * (group->nodeCount + 1)); return (double)node->id;
group->nodes[group->nodeCount] = node;
group->nodeCount += 1;
return nodeId.d;
} }
void Silkworm_NodeSetVelocity(double groupId, double nodeId, double xVelocity, double yVelocity) void Silkworm_NodeSetVelocity(double nodeId, double xVelocity, double yVelocity)
{ {
LookupNode(groupId, nodeId)->velocity.x = xVelocity; LookupNode(nodeId)->velocity.x = (float)xVelocity;
LookupNode(groupId, nodeId)->velocity.y = yVelocity; LookupNode(nodeId)->velocity.y = (float)yVelocity;
} }
void Silkworm_NodeSetAcceleration(double groupId, double nodeId, double xAcceleration, double yAcceleration) void Silkworm_NodeSetAcceleration(double nodeId, double xAcceleration, double yAcceleration)
{ {
LookupNode(groupId, nodeId)->acceleration.x = xAcceleration; LookupNode(nodeId)->acceleration.x = (float)xAcceleration;
LookupNode(groupId, nodeId)->acceleration.y = yAcceleration; LookupNode(nodeId)->acceleration.y = (float)yAcceleration;
} }
void Silkworm_NodeSetDestroyable(double groupId, double nodeId) void Silkworm_NodeSetDestroyable(double nodeId)
{ {
LookupNode(groupId, nodeId)->destroyable = true; LookupNode(nodeId)->destroyable = true;
} }
void Silkworm_NodePin(double groupId, double nodeId) void Silkworm_NodePin(double nodeId)
{ {
LookupNode(groupId, nodeId)->pinned = true; LookupNode(nodeId)->pinned = true;
} }
void Silkworm_NodeUnpin(double groupId, double nodeId) void Silkworm_NodeUnpin(double nodeId)
{ {
LookupNode(groupId, nodeId)->pinned = false; LookupNode(nodeId)->pinned = false;
} }
double Silkworm_CreateLink(double groupId, double aId, double bId, double distance, double tearThreshold) double Silkworm_CreateLink(double aId, double bId, double distance, double tearThreshold)
{ {
Silkworm_Group *group = LookupGroup(groupId); Silkworm_Node *nodeA = LookupNode(aId);
Silkworm_Node *nodeB = LookupNode(bId);
Silkworm_Node *nodeA = LookupNode(groupId, aId); uint64_t id;
Silkworm_Node *nodeB = LookupNode(groupId, bId);
Silkworm_ID linkId; Silkworm_Link* link = malloc(sizeof(Silkworm_Link));
linkId.i = group->linkCount;
Silkworm_Link *link = malloc(sizeof(Silkworm_Link)); if (context->linkIndexStackCount > 0)
link->id = linkId; {
id = context->linkIndexStack[context->linkIndexStackCount - 1];
context->linkIndexStack = realloc(context->linkIndexStack, sizeof(uint64_t) * (context->linkIndexStackCount - 1));
context->linkIndexStackCount -= 1;
context->links[id] = link;
}
else
{
id = context->linkCount;
context->links = realloc(context->links, sizeof(Silkworm_Link*) * (context->linkCount + 1));
context->links[context->linkCount] = link;
context->linkCount += 1;
}
link->id = id;
link->a = nodeA; link->a = nodeA;
link->b = nodeB; link->b = nodeB;
link->distance = distance; link->distance = (float)distance;
link->tearThreshold = tearThreshold; link->tearThreshold = (float)tearThreshold;
group->links = realloc(group->links, sizeof(Silkworm_Link*) * (group->linkCount + 1)); return (double)link->id;
group->links[group->linkCount] = link; }
group->linkCount += 1;
double Silkworm_CreateCloth(double xPosition, double yPosition, double horizontalNodeCount, double verticalNodeCount, double mass, double friction, double windFactor, double tearThreshold)
return linkId.d; {
int32_t i, j;
Silkworm_Cloth* cloth = malloc(sizeof(Silkworm_Cloth));
cloth->windFactor = (float)windFactor;
cloth->horizontalNodeCount = (uint32_t) horizontalNodeCount;
cloth->verticalNodeCount = (uint32_t) verticalNodeCount;
cloth->nodeIndices = malloc(sizeof(uint64_t*) * cloth->horizontalNodeCount);
for (i = 0; i < horizontalNodeCount; i += 1)
{
cloth->nodeIndices[i] = malloc(sizeof(uint64_t) * cloth->verticalNodeCount);
for (j = 0; j < verticalNodeCount; j += 1)
{
uint64_t id = (uint64_t) Silkworm_CreateNode(xPosition + i * context->clothDensity, yPosition + j * context->clothDensity, mass, friction, 1, 0.5);
if (j == 0)
{
Silkworm_NodePin((double)id);
}
Silkworm_NodeSetDestroyable((double)id);
cloth->nodeIndices[i][j] = id;
}
}
cloth->triangles = malloc(sizeof(Silkworm_Triangle*) * cloth->horizontalNodeCount * cloth->verticalNodeCount * 2);
uint32_t triangleIndex = 0;
for (i = 0; i < horizontalNodeCount; i += 1)
{
for (j = 0; j < verticalNodeCount; j += 1)
{
if (i + 1 < horizontalNodeCount && j + 1 < verticalNodeCount)
{
cloth->triangles[triangleIndex] = malloc(sizeof(Silkworm_Triangle));
cloth->triangles[triangleIndex]->a = context->nodes[cloth->nodeIndices[i][j]];
cloth->triangles[triangleIndex]->b = context->nodes[cloth->nodeIndices[i + 1][j]];
cloth->triangles[triangleIndex]->c = context->nodes[cloth->nodeIndices[i][j + 1]];
cloth->triangles[triangleIndex]->orientation = UpperLeft;
cloth->triangles[triangleIndex]->aHorizontalIndex = i;
cloth->triangles[triangleIndex]->aVerticalIndex = j;
cloth->triangles[triangleIndex]->bHorizontalIndex = i + 1;
cloth->triangles[triangleIndex]->bVerticalIndex = j;
cloth->triangles[triangleIndex]->cHorizontalIndex = i;
cloth->triangles[triangleIndex]->cVerticalIndex = j + 1;
triangleIndex += 1;
}
if (i - 1 >= 0 && j - 1 >= 0)
{
cloth->triangles[triangleIndex] = malloc(sizeof(Silkworm_Triangle));
cloth->triangles[triangleIndex]->a = context->nodes[cloth->nodeIndices[i][j]];
cloth->triangles[triangleIndex]->b = context->nodes[cloth->nodeIndices[i - 1][j]];
cloth->triangles[triangleIndex]->c = context->nodes[cloth->nodeIndices[i][j - 1]];
cloth->triangles[triangleIndex]->orientation = BottomRight;
cloth->triangles[triangleIndex]->aHorizontalIndex = i;
cloth->triangles[triangleIndex]->aVerticalIndex = j;
cloth->triangles[triangleIndex]->bHorizontalIndex = i - 1;
cloth->triangles[triangleIndex]->bVerticalIndex = j;
cloth->triangles[triangleIndex]->cHorizontalIndex = i;
cloth->triangles[triangleIndex]->cVerticalIndex = j - 1;
triangleIndex += 1;
}
}
}
cloth->triangleCount = triangleIndex;
for (i = 0; i < horizontalNodeCount; i += 1)
{
for (j = 0; j < verticalNodeCount; j += 1)
{
if (i - 1 >= 0)
{
Silkworm_CreateLink((double)cloth->nodeIndices[i - 1][j], (double)cloth->nodeIndices[i][j], context->clothDensity, tearThreshold);
}
if (j - 1 >= 0)
{
Silkworm_CreateLink((double)cloth->nodeIndices[i][j - 1], (double)cloth->nodeIndices[i][j], context->clothDensity, tearThreshold);
}
}
}
uint64_t id;
id = context->clothCount;
cloth->id = id;
context->cloths = realloc(context->cloths, sizeof(Silkworm_Cloth*) * (context->clothCount + 1));
context->cloths[context->clothCount] = cloth;
context->clothCount += 1;
return (double)cloth->id;
}
void Silkworm_SetTriangleBuffer(const char* bufferId)
{
context->currentBufferAddress = (uint8_t*)bufferId;
}
/* pattern is x, y position then color + alpha then UV position */
double Silkworm_ClothFillTriangleBuffer(double clothId, double leftUV, double widthUV, double topUV, double heightUV)
{
uint32_t i, triangleCount;
uint8_t* bufferAddress = context->currentBufferAddress;
Silkworm_Cloth* cloth = LookupCloth(clothId);
Silkworm_Color color;
color.r = 255;
color.g = 255;
color.b = 255;
color.a = 255;
triangleCount = 0;
for (i = 0; i < cloth->triangleCount; i += 1)
{
if (cloth->triangles[i] != NULL)
{
if (cloth->triangles[i]->orientation == UpperLeft)
{
float left = (float)leftUV + (float)widthUV * ((float)cloth->triangles[i]->aHorizontalIndex / (cloth->horizontalNodeCount - 1));
float right = (float)leftUV + (float)widthUV * ((float)cloth->triangles[i]->bHorizontalIndex / (cloth->horizontalNodeCount - 1));
float top = (float)topUV + (float)heightUV * ((float)cloth->triangles[i]->aVerticalIndex / (cloth->verticalNodeCount - 1));
float bottom = (float)topUV + (float)heightUV * ((float)cloth->triangles[i]->cVerticalIndex / (cloth->verticalNodeCount - 1));
memcpy(bufferAddress, &cloth->triangles[i]->a->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &left, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &top, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &cloth->triangles[i]->b->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &right, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &top, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &cloth->triangles[i]->c->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &left, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &bottom, sizeof(float));
bufferAddress += sizeof(float);
triangleCount += 1;
}
else if (cloth->triangles[i]->orientation == BottomRight)
{
float left = (float)leftUV + (float)widthUV * ((float)cloth->triangles[i]->bHorizontalIndex / (cloth->horizontalNodeCount - 1));
float right = (float)leftUV + (float)widthUV * ((float)cloth->triangles[i]->aHorizontalIndex / (cloth->horizontalNodeCount - 1));
float top = (float)topUV + (float)heightUV * ((float)cloth->triangles[i]->cVerticalIndex / (cloth->verticalNodeCount - 1));
float bottom = (float)topUV + (float)heightUV * ((float)cloth->triangles[i]->aVerticalIndex / (cloth->verticalNodeCount - 1));
memcpy(bufferAddress, &cloth->triangles[i]->a->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &right, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &bottom, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &cloth->triangles[i]->b->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &left, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &bottom, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &cloth->triangles[i]->c->position, sizeof(Silkworm_Vector2));
bufferAddress += sizeof(Silkworm_Vector2);
memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
bufferAddress += sizeof(Silkworm_Color);
memcpy(bufferAddress, &right, sizeof(float));
bufferAddress += sizeof(float);
memcpy(bufferAddress, &top, sizeof(float));
bufferAddress += sizeof(float);
triangleCount += 1;
}
}
}
return (double)triangleCount;
} }

93
src/Silkworm.h
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@ -43,51 +43,80 @@
extern "C" { extern "C" {
#endif /* __cplusplus */ #endif /* __cplusplus */
/* Game Maker only lets us use doubles in the API. So we do type punning to get integers. It's legal in C99! */
typedef union {
int i;
double d;
} Silkworm_ID;
typedef struct Silkworm_Vector2 typedef struct Silkworm_Vector2
{ {
double x; float x;
double y; float y;
} Silkworm_Vector2; } Silkworm_Vector2;
typedef struct Silkworm_Node typedef struct Silkworm_Node
{ {
Silkworm_ID id; uint64_t id;
Silkworm_Vector2 position; Silkworm_Vector2 position;
Silkworm_Vector2 previousPosition; Silkworm_Vector2 previousPosition;
Silkworm_Vector2 velocity; Silkworm_Vector2 velocity;
Silkworm_Vector2 acceleration; Silkworm_Vector2 acceleration;
double mass; float mass;
double friction; float friction;
double radius; float radius;
double pinned; float pinned;
double pushFactor; float pushFactor;
bool destroyable; bool destroyable;
} Silkworm_Node; } Silkworm_Node;
typedef struct Silkworm_Link typedef struct Silkworm_Link
{ {
Silkworm_ID id; uint64_t id;
Silkworm_Node *a; Silkworm_Node *a;
Silkworm_Node *b; Silkworm_Node *b;
double distance; float distance;
double tearThreshold; float tearThreshold;
} Silkworm_Link; } Silkworm_Link;
typedef struct Silkworm_Group typedef enum Silkworm_ClothTriangleOrientation
{
UpperLeft,
BottomRight
} Silkworm_ClothTriangleOrientation;
typedef struct Silkworm_Triangle
{
uint64_t id;
Silkworm_Node* a;
Silkworm_Node* b;
Silkworm_Node* c;
uint32_t aHorizontalIndex;
uint32_t bHorizontalIndex;
uint32_t cHorizontalIndex;
uint32_t aVerticalIndex;
uint32_t bVerticalIndex;
uint32_t cVerticalIndex;
Silkworm_ClothTriangleOrientation orientation;
} Silkworm_Triangle;
typedef struct Silkworm_Cloth
{
uint64_t id;
float windFactor;
uint32_t horizontalNodeCount;
uint32_t verticalNodeCount;
uint64_t **nodeIndices; /* x by y grid of indices */
Silkworm_Triangle **triangles; /* array of pointers so we can use NULL */
uint32_t triangleCount;
} Silkworm_Cloth;
typedef struct Silkworm_Rope
{ {
Silkworm_ID id;
Silkworm_Node **nodes;
uint32_t nodeCount; uint32_t nodeCount;
Silkworm_Link **links; uint32_t *nodeIndices;
uint32_t linkCount; } Silkworm_Rope;
} Silkworm_Group;
/* Version API */ /* Version API */
@ -103,19 +132,19 @@ typedef struct Silkworm_Group
) )
SILKWORMAPI void Silkworm_Init(); SILKWORMAPI void Silkworm_Init();
SILKWORMAPI void Silkworm_Update(); SILKWORMAPI void Silkworm_Update(double delta);
SILKWORMAPI double Silkworm_CreateGroup(); SILKWORMAPI double Silkworm_CreateNode(double xPosition, double yPosition, double mass, double friction, double radius, double pushFactor);
SILKWORMAPI double Silkworm_CreateNode(double groupId, double xPosition, double yPosition, double mass, double friction, double radius, double pushFactor); SILKWORMAPI void Silkworm_NodeSetDestroyable(double nodeId);
SILKWORMAPI void Silkworm_NodePin(double nodeId);
SILKWORMAPI void Silkworm_NodeUnpin(double nodeId);
SILKWORMAPI void Silkworm_NodeSetVelocity(double groupId, double nodeId, double xVelocity, double yVelocity); SILKWORMAPI double Silkworm_CreateLink(double aId, double bId, double distance, double tearThreshold);
SILKWORMAPI void Silkworm_NodeSetAcceleration(double groupId, double nodeId, double xAcceleration, double yAcceleration);
SILKWORMAPI void Silkworm_NodeSetDestroyable(double groupId, double nodeId); SILKWORMAPI double Silkworm_CreateCloth(double xPosition, double yPosition, double horizontalNodeCount, double verticalNodeCount, double mass, double friction, double windFactor, double tearThreshold);
SILKWORMAPI void Silkworm_NodePin(double groupId, double nodeId);
SILKWORMAPI void Silkworm_NodeUnpin(double groupId, double nodeId);
SILKWORMAPI double Silkworm_CreateLink(double groupId, double aId, double bId, double distance, double tearThreshold); SILKWORMAPI void Silkworm_SetTriangleBuffer(const char* bufferId);
SILKWORMAPI double Silkworm_ClothFillTriangleBuffer(double clothId, double leftUV, double widthUV, double topUV, double heightUV);
#endif /* SILKWORM_H */ #endif /* SILKWORM_H */

10
visualc/Silkworm.vcxproj
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@ -21,7 +21,7 @@
<PropertyGroup Label="Globals"> <PropertyGroup Label="Globals">
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<RootNamespace>Silkworm</RootNamespace> <RootNamespace>Silkworm</RootNamespace>
<WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion> <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
</PropertyGroup> </PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" /> <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration"> <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
@ -36,16 +36,16 @@
<CharacterSet>MultiByte</CharacterSet> <CharacterSet>MultiByte</CharacterSet>
</PropertyGroup> </PropertyGroup>
<PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'"> <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<PlatformToolset>v141</PlatformToolset> <PlatformToolset>v142</PlatformToolset>
</PropertyGroup> </PropertyGroup>
<PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'"> <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<PlatformToolset>v141</PlatformToolset> <PlatformToolset>v142</PlatformToolset>
</PropertyGroup> </PropertyGroup>
<PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'"> <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<PlatformToolset>v141</PlatformToolset> <PlatformToolset>v142</PlatformToolset>
</PropertyGroup> </PropertyGroup>
<PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'"> <PropertyGroup Label="Configuration" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<PlatformToolset>v141</PlatformToolset> <PlatformToolset>v142</PlatformToolset>
</PropertyGroup> </PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" /> <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings"> <ImportGroup Label="ExtensionSettings">