editor view buffer

src/Silkworm.c

@@ -1087,7 +1087,200 @@ double Silkworm_ClothFillTriangleBuffer(double clothId, double leftUV, double wi
 		}
 	}
 
-	return (double)triangleCount;
+	return (double)triangleCount * 3;
+}
+
+/* in bytes */
+double Silkworm_GetEditorBufferRequiredSize()
+{
+	return 72 * context->nodeCount + 72 * context->linkCount;
+}
+
+/* position, color */
+double Silkworm_FillEditorBuffer()
+{
+	uint32_t i, triangleCount;
+	uint8_t* bufferAddress = context->currentBufferAddress;
+
+	Silkworm_Vector2 position;
+	position.x = 0;
+	position.y = 0;
+
+	Silkworm_Color color;
+	color.r = 0;
+	color.g = 0;
+	color.b = 255;
+	color.a = 255;
+
+	triangleCount = 0;
+
+	/* draw links */
+	for (i = 0; i < context->linkCount; i += 1)
+	{
+		Silkworm_Link* link = context->links[i];
+
+		if (link != NULL)
+		{
+			/* top left triangle */
+			float left, right, top, bottom;
+
+			if (link->a->position.y < link->b->position.y)
+			{
+				top = link->a->position.y;
+				bottom = link->b->position.y;
+			}
+			else
+			{
+				top = link->b->position.y;
+				bottom = link->a->position.y;
+			}
+
+			if (link->a->position.x < link->b->position.x)
+			{
+				left = link->a->position.x;
+				right = link->b->position.x;
+			}
+			else
+			{
+				left = link->b->position.x;
+				right = link->a->position.x;
+			}
+
+			/* upper left triangle */
+			position.x = left;
+			position.y = top;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = right;
+			position.y = top;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = left;
+			position.y = bottom;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			triangleCount += 1;
+
+			/* bottom right triangle */
+			position.x = left;
+			position.y = bottom;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = right;
+			position.y = top;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = right;
+			position.y = bottom;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			triangleCount += 1;
+		}
+	}
+
+	color.r = 255;
+	color.b = 0;
+
+	/* draw nodes */
+	for (i = 0; i < context->nodeCount; i += 1)
+	{
+		Silkworm_Node* node = context->nodes[i];
+
+		if (node != NULL)
+		{
+			/* top left triangle */
+			position.x = node->position.x - node->radius;
+			position.y = node->position.y - node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = node->position.x + node->radius;
+			position.y = node->position.y - node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = node->position.x - node->radius;
+			position.y = node->position.y + node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			triangleCount += 1;
+
+			/* bottom right triangle */
+			position.x = node->position.x - node->radius;
+			position.y = node->position.y + node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = node->position.x + node->radius;
+			position.y = node->position.y - node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			position.x = node->position.x + node->radius;
+			position.y = node->position.y + node->radius;
+
+			memcpy(bufferAddress, &position, sizeof(Silkworm_Vector2));
+			bufferAddress += sizeof(Silkworm_Vector2);
+
+			memcpy(bufferAddress, &color, sizeof(Silkworm_Color));
+			bufferAddress += sizeof(Silkworm_Color);
+
+			triangleCount += 1;
+		}
+	}
+
+	return (double)triangleCount * 3;
 }
 
 void Silkworm_PushNodesInRadius(double x, double y, double radius, double xDirection, double yDirection)

src/Silkworm.h

@@ -75,6 +75,9 @@ SILKWORMAPI void Silkworm_DestroyCloth(double clothId);
 SILKWORMAPI void Silkworm_SetTriangleBuffer(const char* bufferId);
 SILKWORMAPI double Silkworm_ClothFillTriangleBuffer(double clothId, double leftUV, double widthUV, double topUV, double heightUV);
 
+SILKWORMAPI double Silkworm_GetEditorBufferRequiredSize();
+SILKWORMAPI double Silkworm_FillEditorBuffer();
+
 SILKWORMAPI void Silkworm_DestroyNode(double nodeId);
 
 SILKWORMAPI void Silkworm_PushNodesInRadius(double x, double y, double radius, double xDirection, double yDirection);