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Simplify some code using vector operations.

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This commit is contained in:
IntegratedQuantum 2023-11-10 20:25:07 +01:00
parent b8b30363d7
commit fe9c001fd8
1 changed files with 5 additions and 12 deletions
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17
src/renderer.zig
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@ -626,9 +626,7 @@ pub const Frustum = struct {
inline for(self.planes) |plane| { inline for(self.planes) |plane| {
var dist: f32 = vec.dot(pos - plane.pos, plane.norm); var dist: f32 = vec.dot(pos - plane.pos, plane.norm);
// Find the most positive corner: // Find the most positive corner:
dist += @max(0, dim[0]*plane.norm[0]); dist += @reduce(.Add, @max(Vec3f{0, 0, 0}, dim*plane.norm));
dist += @max(0, dim[1]*plane.norm[1]);
dist += @max(0, dim[2]*plane.norm[2]);
if(dist < 0) return false; if(dist < 0) return false;
} }
return true; return true;
@ -1239,22 +1237,17 @@ pub const RenderStructure = struct {
var curCorner: usize = 0; var curCorner: usize = 0;
for(0..2) |a| { for(0..2) |a| {
for(0..2) |b| { for(0..2) |b| {
var cornerVector: Vec3f = undefined; var cornerVector: Vec3f = undefined;
switch(chunk.Neighbors.vectorComponent[neighbor]) { switch(chunk.Neighbors.vectorComponent[neighbor]) {
.x => { .x => {
cornerVector[0] = minVec[0]; cornerVector = @select(f32, @Vector(3, bool){true, a == 0, b == 0}, minVec, maxVec);
cornerVector[1] = if(a == 0) minVec[1] else maxVec[1];
cornerVector[2] = if(b == 0) minVec[2] else maxVec[2];
}, },
.y => { .y => {
cornerVector[1] = minVec[1]; cornerVector = @select(f32, @Vector(3, bool){a == 0, true, b == 0}, minVec, maxVec);
cornerVector[0] = if(a == 0) minVec[0] else maxVec[0];
cornerVector[2] = if(b == 0) minVec[2] else maxVec[2];
}, },
.z => { .z => {
cornerVector[2] = minVec[2]; cornerVector = @select(f32, @Vector(3, bool){a == 0, b == 0, true}, minVec, maxVec);
cornerVector[0] = if(a == 0) minVec[0] else maxVec[0];
cornerVector[1] = if(b == 0) minVec[1] else maxVec[1];
}, },
} }
corners[curCorner] = projRotMat.mulVec(vec.combine(relPosFloat + cornerVector, 1)); corners[curCorner] = projRotMat.mulVec(vec.combine(relPosFloat + cornerVector, 1));