/*--------------------------------------------------------------------------------------------*/
public static void BuildCircleMesh(MeshBuilder pMeshBuild, float pRadius, int pSteps)
{
const float angleFull = (float)Math.PI*2;
float angleInc = angleFull/pSteps;
float angle = 0;
pMeshBuild.Resize(pSteps+2, pSteps*3);
pMeshBuild.AddVertex(Vector3.zero);
pMeshBuild.AddUv(new Vector2(0, 0));
for ( int i = 0 ; i <= pSteps ; ++i ) {
pMeshBuild.AddVertex(GetRingPoint(pRadius, angle));
pMeshBuild.AddUv(new Vector2(i/(float)pSteps, 1));
if ( i > 0 ) {
int vi = pMeshBuild.VertexIndex;
pMeshBuild.AddTriangle(0, vi-2, vi-1);
}
angle += angleInc;
}
}
/*--------------------------------------------------------------------------------------------*/
public static void BuildHollowRectangleMesh(MeshBuilder pMeshBuild,
float pOuterW, float pOuterH, float pInnerW, float pInnerH)
{
float halfOuterW = pOuterW/2;
float halfOuterH = pOuterH/2;
float halfInnerW = pInnerW/2;
float halfInnerH = pInnerH/2;
float innerUvMaxX = 0.5f + halfInnerW/halfOuterW/2;
float innerUvMinX = 0.5f - halfInnerW/halfOuterW/2;
float innerUvMaxY = 0.5f + halfInnerH/halfOuterH/2;
float innerUvMinY = 0.5f - halfInnerH/halfOuterH/2;
pMeshBuild.Resize(8, 24);
pMeshBuild.ResetIndices();
pMeshBuild.AddVertex(new Vector3( halfOuterW, halfOuterH, 0));
pMeshBuild.AddVertex(new Vector3( halfOuterW, -halfOuterH, 0));
pMeshBuild.AddVertex(new Vector3(-halfOuterW, -halfOuterH, 0));
pMeshBuild.AddVertex(new Vector3(-halfOuterW, halfOuterH, 0));
pMeshBuild.AddVertex(new Vector3( halfInnerW, halfInnerH, 0));
pMeshBuild.AddVertex(new Vector3( halfInnerW, -halfInnerH, 0));
pMeshBuild.AddVertex(new Vector3(-halfInnerW, -halfInnerH, 0));
pMeshBuild.AddVertex(new Vector3(-halfInnerW, halfInnerH, 0));
pMeshBuild.AddUv(new Vector2(1, 1));
pMeshBuild.AddUv(new Vector2(1, 0));
pMeshBuild.AddUv(new Vector2(0, 0));
pMeshBuild.AddUv(new Vector2(0, 1));
pMeshBuild.AddUv(new Vector2(innerUvMaxX, innerUvMaxY));
pMeshBuild.AddUv(new Vector2(innerUvMaxX, innerUvMinY));
pMeshBuild.AddUv(new Vector2(innerUvMinX, innerUvMinY));
pMeshBuild.AddUv(new Vector2(innerUvMinX, innerUvMaxY));
pMeshBuild.AddTriangle(0, 1, 4);
pMeshBuild.AddTriangle(1, 5, 4);
pMeshBuild.AddTriangle(1, 2, 5);
pMeshBuild.AddTriangle(2, 6, 5);
pMeshBuild.AddTriangle(2, 3, 6);
pMeshBuild.AddTriangle(3, 7, 6);
pMeshBuild.AddTriangle(3, 4, 7);
pMeshBuild.AddTriangle(3, 0, 4);
}
////////////////////////////////////////////////////////////////////////////////////////////////
/*--------------------------------------------------------------------------------------------*/
public static void BuildQuadMesh(MeshBuilder pMeshBuild, float pSizeX=1, float pSizeY=1)
{
float halfSizeX = pSizeX/2;
float halfSizeY = pSizeY/2;
pMeshBuild.Resize(4, 6);
pMeshBuild.ResetIndices();
pMeshBuild.AddVertex(new Vector3( halfSizeX, halfSizeY, 0));
pMeshBuild.AddVertex(new Vector3( halfSizeX, -halfSizeY, 0));
pMeshBuild.AddVertex(new Vector3(-halfSizeX, -halfSizeY, 0));
pMeshBuild.AddVertex(new Vector3(-halfSizeX, halfSizeY, 0));
pMeshBuild.AddUv(new Vector2(1, 1));
pMeshBuild.AddUv(new Vector2(1, 0));
pMeshBuild.AddUv(new Vector2(0, 0));
pMeshBuild.AddUv(new Vector2(0, 1));
pMeshBuild.AddTriangle(0, 1, 2);
pMeshBuild.AddTriangle(0, 2, 3);
}
/*--------------------------------------------------------------------------------------------*/
public static void BuildRingMesh(MeshBuilder pMeshBuild, float pInnerRadius, float pOuterRadius,
float pAngle0, float pAngle1, Vector3 pInnerOffset, Vector3 pOuterOffset, int pSteps)
{
float angleFull = pAngle1-pAngle0;
float angleInc = angleFull/pSteps;
float angle = pAngle0;
pMeshBuild.Resize((pSteps+1)*2, pSteps*6);
pMeshBuild.ResetIndices();
for ( int i = 0 ; i <= pSteps ; ++i ) {
float uvx = i/(float)pSteps;
pMeshBuild.AddVertex(pInnerOffset+GetRingPoint(pInnerRadius, angle));
pMeshBuild.AddVertex(pOuterOffset+GetRingPoint(pOuterRadius, angle));
pMeshBuild.AddUv(new Vector2(uvx, 0));
pMeshBuild.AddUv(new Vector2(uvx, 1));
if ( i > 0 ) {
int vi = pMeshBuild.VertexIndex;
pMeshBuild.AddTriangle(vi-3, vi-4, vi-2);
pMeshBuild.AddTriangle(vi-1, vi-3, vi-2);
}
angle += angleInc;
}
}
/*--------------------------------------------------------------------------------------------*/
public static void BuildRectangleMesh(MeshBuilder pMeshBuild, float pWidth, float pHeight,
float pAmount)
{
float fullW;
float fullH;
if ( pWidth >= pHeight ) {
fullH = pHeight*pAmount;
fullW = pWidth-(pHeight-fullH);
}
else {
fullW = pWidth*pAmount;
fullH = pHeight-(pWidth-fullW);
}
float halfW = fullW/2f;
float halfH = fullH/2f;
pMeshBuild.Resize(4, 6);
pMeshBuild.ResetIndices();
pMeshBuild.AddVertex(new Vector3( halfW, halfH, 0));
pMeshBuild.AddVertex(new Vector3( halfW, -halfH, 0));
pMeshBuild.AddVertex(new Vector3(-halfW, -halfH, 0));
pMeshBuild.AddVertex(new Vector3(-halfW, halfH, 0));
pMeshBuild.AddUv(new Vector2(1, 1));
pMeshBuild.AddUv(new Vector2(1, 0));
pMeshBuild.AddUv(new Vector2(0, 0));
pMeshBuild.AddUv(new Vector2(0, 1));
pMeshBuild.AddTriangle(0, 1, 2);
pMeshBuild.AddTriangle(0, 2, 3);
pMeshBuild.AddRemainingUvs(Vector2.zero);
}