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125 lines
4 KiB
C++
125 lines
4 KiB
C++
#include "Camera.h"
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#ifdef GLES
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#include <GLES3/gl3.h>
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#else
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#include <GL/gl.h>
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#endif
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#include <glm/glm.hpp>
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#include <math.h>
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#include <string.h>
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#include <numbers>
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#include "MemoryTracker.h"
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#include "app/include/stubs.h"
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#include "platform/sdl2/Render.h"
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#include "java/FloatBuffer.h"
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#include "minecraft/world/entity/LivingEntity.h"
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#include "minecraft/world/entity/player/Player.h"
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#include "minecraft/world/level/Level.h"
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#include "minecraft/world/level/TilePos.h"
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#include "minecraft/world/level/material/Material.h"
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#include "minecraft/world/level/tile/LiquidTile.h"
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#include "minecraft/world/level/tile/Tile.h"
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#include "minecraft/world/phys/Vec3.h"
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float Camera::xPlayerOffs = 0.0f;
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float Camera::yPlayerOffs = 0.0f;
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float Camera::zPlayerOffs = 0.0f;
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// IntBuffer *Camera::viewport = MemoryTracker::createIntBuffer(16);
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FloatBuffer* Camera::modelview = MemoryTracker::createFloatBuffer(16);
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FloatBuffer* Camera::projection = MemoryTracker::createFloatBuffer(16);
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// FloatBuffer *Camera::position = MemoryTracker::createFloatBuffer(3);
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float Camera::xa = 0.0f;
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float Camera::ya = 0.0f;
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float Camera::za = 0.0f;
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float Camera::xa2 = 0.0f;
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float Camera::za2 = 0.0f;
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void Camera::prepare(std::shared_ptr<Player> player, bool mirror) {
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glGetFloat(GL_MODELVIEW_MATRIX, modelview);
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glGetFloat(GL_PROJECTION_MATRIX, projection);
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/* Original java code for reference
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glGetInteger(GL_VIEWPORT, viewport);
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float x = (viewport.get(0) + viewport.get(2)) / 2;
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float y = (viewport.get(1) + viewport.get(3)) / 2;
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gluUnProject(x, y, 0, modelview, projection, viewport, position);
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xPlayerOffs = position->get(0);
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yPlayerOffs = position->get(1);
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zPlayerOffs = position->get(2);
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*/
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// Xbox conversion here... note that we don't bother getting the viewport as
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// this is just working out how to get a (0,0,0) point in clip space to pass
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// into the inverted combined model/view/projection matrix, so we just need
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// to get this matrix and get its translation as an equivalent.
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// 4jcraft: swapped from dxmath to glm
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glm::mat4 _modelview, _proj, _final, _invert;
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glm::vec4 trans;
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memcpy(&_modelview, modelview->_getDataPointer(), 64);
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memcpy(&_proj, projection->_getDataPointer(), 64);
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_final = _proj * _modelview;
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_invert = glm::inverse(_final);
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trans = _invert[3];
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xPlayerOffs = trans.x / trans.w;
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yPlayerOffs = trans.y / trans.w;
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zPlayerOffs = trans.z / trans.w;
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int flipCamera = mirror ? 1 : 0;
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float xRot = player->xRot;
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float yRot = player->yRot;
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xa = cosf(yRot * std::numbers::pi / 180.0f) * (1 - flipCamera * 2);
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za = sinf(yRot * std::numbers::pi / 180.0f) * (1 - flipCamera * 2);
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xa2 = -za * sinf(xRot * std::numbers::pi / 180.0f) * (1 - flipCamera * 2);
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za2 = xa * sinf(xRot * std::numbers::pi / 180.0f) * (1 - flipCamera * 2);
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ya = cosf(xRot * std::numbers::pi / 180.0f);
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}
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TilePos* Camera::getCameraTilePos(std::shared_ptr<LivingEntity> player,
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double alpha) {
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Vec3 cam_pos = getCameraPos(player, alpha);
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return new TilePos(&cam_pos);
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}
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Vec3 Camera::getCameraPos(std::shared_ptr<LivingEntity> player, double alpha) {
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double xx = player->xo + (player->x - player->xo) * alpha;
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double yy =
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player->yo + (player->y - player->yo) * alpha + player->getHeadHeight();
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double zz = player->zo + (player->z - player->zo) * alpha;
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double xt = xx + Camera::xPlayerOffs * 1;
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double yt = yy + Camera::yPlayerOffs * 1;
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double zt = zz + Camera::zPlayerOffs * 1;
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return Vec3(xt, yt, zt);
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}
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int Camera::getBlockAt(Level* level, std::shared_ptr<LivingEntity> player,
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float alpha) {
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Vec3 p = Camera::getCameraPos(player, alpha);
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TilePos tp = TilePos(&p);
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int t = level->getTile(tp.x, tp.y, tp.z);
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if (t != 0 && Tile::tiles[t]->material->isLiquid()) {
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float hh =
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LiquidTile::getHeight(level->getData(tp.x, tp.y, tp.z)) - 1 / 9.0f;
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float h = tp.y + 1 - hh;
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if (p.y >= h) {
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t = level->getTile(tp.x, tp.y + 1, tp.z);
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}
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}
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return t;
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}
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