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Make round shadow for the corner of fliped page #106

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Make round shadow for the corner of fliped page #106

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64 changes: 50 additions & 14 deletions src/fi/harism/curl/CurlMesh.java
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,8 @@ public class CurlMesh {
private int mVerticesCountBack;
private int mVerticesCountFront;

private static final int EDGE_COORDS_PENUMBRA_COUNT = 5;

/**
* Constructor for mesh object.
*
Expand All @@ -123,12 +125,12 @@ public CurlMesh(int maxCurlSplits) {

if (DRAW_SHADOW) {
mArrSelfShadowVertices = new Array<ShadowVertex>(
(mMaxCurlSplits + 2) * 2);
(mMaxCurlSplits + 2 + EDGE_COORDS_PENUMBRA_COUNT) * 2);
mArrDropShadowVertices = new Array<ShadowVertex>(
(mMaxCurlSplits + 2) * 2);
(mMaxCurlSplits + 2 + EDGE_COORDS_PENUMBRA_COUNT) * 2);
mArrTempShadowVertices = new Array<ShadowVertex>(
(mMaxCurlSplits + 2) * 2);
for (int i = 0; i < (mMaxCurlSplits + 2) * 2; ++i) {
(mMaxCurlSplits + 2 + EDGE_COORDS_PENUMBRA_COUNT) * 2);
for (int i = 0; i < (mMaxCurlSplits + 2 + EDGE_COORDS_PENUMBRA_COUNT) * 2; ++i) {
mArrTempShadowVertices.add(new ShadowVertex());
}
}
Expand Down Expand Up @@ -175,7 +177,7 @@ public CurlMesh(int maxCurlSplits) {
mBufColors.position(0);

if (DRAW_SHADOW) {
int maxShadowVerticesCount = (mMaxCurlSplits + 2) * 2 * 2;
int maxShadowVerticesCount = (mMaxCurlSplits + 2 + EDGE_COORDS_PENUMBRA_COUNT) * 2 * 2;
ByteBuffer scbb = ByteBuffer
.allocateDirect(maxShadowVerticesCount * 4 * 4);
scbb.order(ByteOrder.nativeOrder());
Expand Down Expand Up @@ -487,15 +489,49 @@ else if (i == mArrScanLines.size() - 1 || curlLength == 0) {
}
// Self shadow is cast partly over mesh.
if (DRAW_SHADOW && v.mPosZ > radius) {
ShadowVertex sv = mArrTempShadowVertices.remove(0);
sv.mPosX = v.mPosX;
sv.mPosY = v.mPosY;
sv.mPosZ = v.mPosZ;
sv.mPenumbraX = ((v.mPosZ - radius) / 3) * v.mPenumbraX;
sv.mPenumbraY = ((v.mPosZ - radius) / 3) * v.mPenumbraY;
sv.mPenumbraColor = (v.mPosZ - radius) / (2 * radius);
int idx = (mArrSelfShadowVertices.size() + 1) / 2;
mArrSelfShadowVertices.add(idx, sv);
if(i == mArrScanLines.size() - 1 && mArrOutputVertices.size() == 0){
double completeRotateCurlAngle = Math.PI / 2;

double halfAngle = completeRotateCurlAngle / 2;

double vPenumbraX = ((v.mPosZ - radius) / 3) * v.mPenumbraX;
double vPenumbraY = ((v.mPosZ - radius) / 3) * v.mPenumbraY;
double penumbraColor = (v.mPosZ - radius) / (2 * radius);

double angle = Math.atan2(vPenumbraY, vPenumbraX);
double angleStart = angle + halfAngle;
double angleStep = completeRotateCurlAngle / EDGE_COORDS_PENUMBRA_COUNT;

double distance = Math.sqrt(vPenumbraX * vPenumbraX + vPenumbraY * vPenumbraY);

int idx = (mArrSelfShadowVertices.size() + 1) / 2;

for(int j = 0; j < EDGE_COORDS_PENUMBRA_COUNT; j++){
ShadowVertex sv = mArrTempShadowVertices.remove(0);
double a = angleStart - (angleStep * j);
double penumbraX = Math.cos(a) * distance;
double penumbraY = Math.sin(a) * distance;

sv.mPosX = v.mPosX;
sv.mPosY = v.mPosY;
sv.mPosZ = v.mPosZ;
sv.mPenumbraX = penumbraX;
sv.mPenumbraY = penumbraY;
sv.mPenumbraColor = penumbraColor;

mArrSelfShadowVertices.add(idx + j, sv);
}
}else{
ShadowVertex sv = mArrTempShadowVertices.remove(0);
sv.mPosX = v.mPosX;
sv.mPosY = v.mPosY;
sv.mPosZ = v.mPosZ;
sv.mPenumbraX = ((v.mPosZ - radius) / 3) * v.mPenumbraX;
sv.mPenumbraY = ((v.mPosZ - radius) / 3) * v.mPenumbraY;
sv.mPenumbraColor = (v.mPosZ - radius) / (2 * radius);
int idx = (mArrSelfShadowVertices.size() + 1) / 2;
mArrSelfShadowVertices.add(idx, sv);
}
}
}

Expand Down