refactor project structure, implement tessellator
This commit is contained in:
LabyStudio
@@ -0,0 +1,265 @@
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window.BoundingBox = class {
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/**
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* Bounding box
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*
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* @param minX Minimum x side
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* @param minY Minimum y side
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* @param minZ Minimum z side
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* @param maxX Maximum x side
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* @param maxY Maximum y side
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* @param maxZ Maximum z side
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*/
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constructor(minX, minY, minZ, maxX, maxY, maxZ) {
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this.epsilon = 0.0;
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this.minX = minX;
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this.minY = minY;
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this.minZ = minZ;
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this.maxX = maxX;
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this.maxY = maxY;
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this.maxZ = maxZ;
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}
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/**
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* Copy the current bounding box object
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*
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* @return Clone of the bounding box
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*/
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clone() {
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return new BoundingBox(this.minX, this.minY, this.minZ, this.maxX, this.maxY, this.maxZ);
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}
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/**
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* Expand the bounding box. Positive and negative numbers controls which side of the box should grow.
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*
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* @param x Amount to expand the minX or maxX
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* @param y Amount to expand the minY or maxY
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* @param z Amount to expand the minZ or maxZ
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* @return The expanded bounding box
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*/
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expand(x, y, z) {
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let minX = this.minX;
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let minY = this.minY;
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let minZ = this.minZ;
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let maxX = this.maxX;
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let maxY = this.maxY;
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let maxZ = this.maxZ;
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// Handle expanding of min/max x
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if (x < 0.0) {
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minX += x;
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} else {
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maxX += x;
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}
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// Handle expanding of min/max y
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if (y < 0.0) {
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minY += y;
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} else {
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maxY += y;
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}
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// Handle expanding of min/max z
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if (z < 0.0) {
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minZ += z;
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} else {
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maxZ += z;
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}
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// Create new bounding box
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return new BoundingBox(minX, minY, minZ, maxX, maxY, maxZ);
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}
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/**
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* Expand the bounding box on both sides.
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* The center is always fixed when using grow.
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*
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* @param x
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* @param y
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* @param z
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* @return
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*/
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grow(x, y, z) {
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return new BoundingBox(
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this.minX - x,
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this.minY - y,
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this.minZ - z,
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this.maxX + x,
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this.maxY + y,
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this.maxZ + z
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);
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}
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/**
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* Check for collision on the X axis
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*
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* @param otherBoundingBox The other bounding box that is colliding with the this one.
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* @param x Position on the X axis that is colliding
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* @return Returns the corrected x position that collided.
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*/
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clipXCollide(otherBoundingBox, x) {
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// Check if the boxes are colliding on the Y axis
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if (otherBoundingBox.maxY <= this.minY || otherBoundingBox.minY >= this.maxY) {
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return x;
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}
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// Check if the boxes are colliding on the Z axis
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if (otherBoundingBox.maxZ <= this.minZ || otherBoundingBox.minZ >= this.maxZ) {
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return x;
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}
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// Check for collision if the X axis of the current box is bigger
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if (x > 0.0 && otherBoundingBox.maxX <= this.minX) {
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let max = this.minX - otherBoundingBox.maxX - this.epsilon;
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if (max < x) {
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x = max;
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}
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}
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// Check for collision if the X axis of the current box is smaller
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if (x < 0.0 && otherBoundingBox.minX >= this.maxX) {
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let max = this.maxX - otherBoundingBox.minX + this.epsilon;
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if (max > x) {
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x = max;
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}
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}
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return x;
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}
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/**
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* Check for collision on the Y axis
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*
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* @param otherBoundingBox The other bounding box that is colliding with the this one.
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* @param y Position on the X axis that is colliding
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* @return Returns the corrected x position that collided.
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*/
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clipYCollide(otherBoundingBox, y) {
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// Check if the boxes are colliding on the X axis
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if (otherBoundingBox.maxX <= this.minX || otherBoundingBox.minX >= this.maxX) {
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return y;
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}
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// Check if the boxes are colliding on the Z axis
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if (otherBoundingBox.maxZ <= this.minZ || otherBoundingBox.minZ >= this.maxZ) {
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return y;
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}
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// Check for collision if the Y axis of the current box is bigger
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if (y > 0.0 && otherBoundingBox.maxY <= this.minY) {
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let max = this.minY - otherBoundingBox.maxY - this.epsilon;
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if (max < y) {
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y = max;
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}
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}
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// Check for collision if the Y axis of the current box is bigger
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if (y < 0.0 && otherBoundingBox.minY >= this.maxY) {
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let max = this.maxY - otherBoundingBox.minY + this.epsilon;
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if (max > y) {
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y = max;
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}
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}
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return y;
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}
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/**
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* Check for collision on the Y axis
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*
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* @param otherBoundingBox The other bounding box that is colliding with the this one.
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* @param z Position on the X axis that is colliding
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* @return Returns the corrected x position that collided.
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*/
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clipZCollide(otherBoundingBox, z) {
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// Check if the boxes are colliding on the X axis
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if (otherBoundingBox.maxX <= this.minX || otherBoundingBox.minX >= this.maxX) {
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return z;
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}
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// Check if the boxes are colliding on the Y axis
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if (otherBoundingBox.maxY <= this.minY || otherBoundingBox.minY >= this.maxY) {
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return z;
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}
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// Check for collision if the Z axis of the current box is bigger
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if (z > 0.0 && otherBoundingBox.maxZ <= this.minZ) {
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let max = this.minZ - otherBoundingBox.maxZ - this.epsilon;
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if (max < z) {
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z = max;
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}
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}
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// Check for collision if the Z axis of the current box is bigger
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if (z < 0.0 && otherBoundingBox.minZ >= this.maxZ) {
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let max = this.maxZ - otherBoundingBox.minZ + this.epsilon;
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if (max > z) {
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z = max;
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}
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}
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return z;
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}
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/**
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* Check if the two boxes are intersecting/overlapping
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*
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* @param otherBoundingBox The other bounding box that could intersect
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* @return The two boxes are overlapping
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*/
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intersects(otherBoundingBox) {
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// Check on X axis
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if (otherBoundingBox.maxX <= this.minX || otherBoundingBox.minX >= this.maxX) {
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return false;
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}
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// Check on Y axis
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if (otherBoundingBox.maxY <= this.minY || otherBoundingBox.minY >= this.maxY) {
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return false;
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}
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// Check on Z axis
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return (!(otherBoundingBox.maxZ <= this.minZ)) && (!(otherBoundingBox.minZ >= this.maxZ));
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}
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/**
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* Move the bounding box relative.
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*
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* @param x Relative offset x
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* @param y Relative offset y
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* @param z Relative offset z
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*/
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move(x, y, z) {
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this.minX += x;
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this.minY += y;
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this.minZ += z;
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this.maxX += x;
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this.maxY += y;
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this.maxZ += z;
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}
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/**
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* Create a new bounding box with the given offset
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*
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* @param x Relative offset x
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* @param y Relative offset x
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* @param z Relative offset x
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* @return New bounding box with the given offset relative to this bounding box
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*/
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offset(x, y, z) {
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return new BoundingBox(
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this.minX + x,
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this.minY + y,
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this.minZ + z,
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this.maxX + x,
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this.maxY + y,
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this.maxZ + z
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);
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}
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}
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