mirror of https://github.com/AxioDL/metaforce.git
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
#include "Runtime/Graphics/CPVSVisSet.hpp"
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#include "Runtime/Graphics/CPVSVisOctree.hpp"
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namespace metaforce {
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void CPVSVisSet::Reset(EPVSVisSetState state) {
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x0_state = state;
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x4_numBits = 0;
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x8_numLights = 0;
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// xc_ = false;
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x10_ptr = nullptr;
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}
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EPVSVisSetState CPVSVisSet::GetVisible(u32 idx) const {
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if (x0_state != EPVSVisSetState::NodeFound)
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return x0_state;
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u32 numFeatures = x4_numBits - x8_numLights;
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if (idx < numFeatures) {
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/* This is a feature lookup */
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if (!(x10_ptr[idx / 8] & (1 << (idx & 0x7))))
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return EPVSVisSetState::EndOfTree;
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return EPVSVisSetState::OutOfBounds;
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}
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/* This is a light lookup */
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u32 lightTest = idx - numFeatures + idx;
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const u8* ptr = &x10_ptr[lightTest / 8];
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lightTest &= 0x7;
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if (lightTest != 0x7)
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return EPVSVisSetState((ptr[0] & (0x3 << lightTest)) >> lightTest);
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return EPVSVisSetState((ptr[0] >> 7) | ((ptr[1] & 0x1) << 1));
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}
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void CPVSVisSet::SetFromMemory(u32 numBits, u32 numLights, const u8* leafPtr) {
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x0_state = EPVSVisSetState::NodeFound;
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x4_numBits = numBits;
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x8_numLights = numLights;
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x10_ptr = leafPtr;
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}
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void CPVSVisSet::SetTestPoint(const CPVSVisOctree& octree, const zeus::CVector3f& point) {
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if (!octree.GetBounds().pointInside(point)) {
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Reset(EPVSVisSetState::OutOfBounds);
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return;
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}
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const u8* octCur = octree.GetOctreeData();
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octree.ResetSearch();
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s32 nextNodeRel;
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u8 curNode;
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while ((nextNodeRel = octree.IterateSearch((curNode = *octCur++), point)) != -1) {
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if (nextNodeRel) {
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/* Skip node data */
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if (!(curNode & 0x60)) {
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octCur += SBig(reinterpret_cast<const u16*>(octCur)[nextNodeRel - 1]);
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} else if (curNode & 0x20) {
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octCur += *(octCur + nextNodeRel - 1);
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} else {
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const u8* tmp = octCur + (nextNodeRel - 1) * 3;
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octCur += (tmp[0] << 16) + (tmp[1] << 8) + tmp[2];
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}
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}
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/* Skip children data */
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if (!(curNode & 0x60)) {
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octCur += (octree.GetNumChildren(curNode) - 1) * 2;
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} else if (curNode & 0x20) {
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octCur += octree.GetNumChildren(curNode) - 1;
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} else {
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octCur += (octree.GetNumChildren(curNode) - 1) * 3;
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}
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}
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/* Handle leaf type */
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switch (curNode & 0x18) {
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case 0x18:
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SetFromMemory(octree.GetNumObjects(), octree.GetNumLights(), octCur);
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break;
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case 0x10:
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Reset(EPVSVisSetState::EndOfTree);
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break;
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case 0x08:
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default:
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Reset(EPVSVisSetState::OutOfBounds);
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break;
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}
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}
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} // namespace metaforce
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