/*--------------------------------------------------------------------------------------------*/
public static void BuildRingMesh(MeshBuilder pMeshBuild, float pInnerRadius, float pOuterRadius,
float pAngle0, float pAngle1, 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(GetRingPoint(pInnerRadius, angle));
pMeshBuild.AddVertex(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 BuildQuadMesh(MeshBuilder pMeshBuild) {
const float size = 0.5f;
pMeshBuild.Resize(4, 6);
pMeshBuild.ResetIndices();
pMeshBuild.AddVertex(new Vector3( size, size, 0));
pMeshBuild.AddVertex(new Vector3( size, -size, 0));
pMeshBuild.AddVertex(new Vector3(-size, -size, 0));
pMeshBuild.AddVertex(new Vector3(-size, size, 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 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;
}
}