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Working on adjusting the range limits when we raise/lower past the original

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bounds.
This commit is contained in:
Andrzej Kapolka 2014-11-17 11:43:16 -08:00
parent f192f2428e
commit 683306797d
1 changed files with 32 additions and 4 deletions
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36
libraries/metavoxels/src/Spanner.cpp
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@ -1741,7 +1741,7 @@ Spanner* Heightfield::paintHeight(const glm::vec3& position, float radius, float
glm::vec3 start = glm::floor(center - extents);
glm::vec3 end = glm::ceil(center + extents);
// paint all points within the radius
// first see if we're going to exceed the range limits
float z = qMax(start.z, 0.0f);
float startX = qMax(start.x, 0.0f), endX = qMin(end.x, (float)highestX);
quint16* lineDest = contents.data() + (int)z * heightWidth + (int)startX;
@ -1749,6 +1749,34 @@ Spanner* Heightfield::paintHeight(const glm::vec3& position, float radius, float
float squaredRadiusReciprocal = 1.0f / squaredRadius;
float scaledHeight = height * numeric_limits<quint16>::max() / (getScale() * _aspectY);
float multiplierZ = inverseScale.x / inverseScale.z;
int minimumValue = 1, maximumValue = numeric_limits<quint16>::max();
for (float endZ = qMin(end.z, (float)highestZ); z <= endZ; z += 1.0f) {
quint16* dest = lineDest;
for (float x = startX; x <= endX; x += 1.0f, dest++) {
float dx = x - center.x, dz = (z - center.z) * multiplierZ;
float distanceSquared = dx * dx + dz * dz;
if (distanceSquared <= squaredRadius) {
// height falls off towards edges
int value = *dest;
if (value != 0) {
value += scaledHeight * (squaredRadius - distanceSquared) * squaredRadiusReciprocal;
minimumValue = qMin(minimumValue, value);
maximumValue = qMax(maximumValue, value);
}
}
}
lineDest += heightWidth;
}
// renormalize if necessary
if (minimumValue < 1 || maximumValue > numeric_limits<quint16>::max()) {
}
// now apply the actual change
z = qMax(start.z, 0.0f);
lineDest = contents.data() + (int)z * heightWidth + (int)startX;
scaledHeight = height * numeric_limits<quint16>::max() / (getScale() * newHeightfield->getAspectY());
bool changed = false;
for (float endZ = qMin(end.z, (float)highestZ); z <= endZ; z += 1.0f) {
quint16* dest = lineDest;
@ -1757,9 +1785,9 @@ Spanner* Heightfield::paintHeight(const glm::vec3& position, float radius, float
float distanceSquared = dx * dx + dz * dz;
if (distanceSquared <= squaredRadius) {
// height falls off towards edges
int value = *dest + scaledHeight * (squaredRadius - distanceSquared) * squaredRadiusReciprocal;
if (value != *dest) {
*dest = qMin(qMax(value, 0), (int)numeric_limits<quint16>::max());
int value = *dest;
if (value != 0) {
*dest = value + scaledHeight * (squaredRadius - distanceSquared) * squaredRadiusReciprocal;
changed = true;
}
}