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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "startrek/startrek.h"
namespace StarTrek {
void StarTrekEngine::initStarfieldPosition() {
_starfieldPosition = Point3(0, 0, 0);
_someMatrix = initMatrix();
}
void StarTrekEngine::initStarfield(int16 x, int16 y, int16 width, int16 height, int16 arg8) {
// TODO: finish
_starfieldXVar1 = (x + width) / 2;
_starfieldYVar1 = (y + height) / 2;
_starfieldXVar2 = (width - x + 1) / 2;
_starfieldYVar2 = (height - y + 1) / 2;
_starfieldRect.left = _starfieldXVar1 - _starfieldXVar2;
_starfieldRect.right = _starfieldXVar1 + _starfieldXVar2;
_starfieldRect.top = _starfieldYVar1 - _starfieldYVar2;
_starfieldRect.bottom = _starfieldYVar1 + _starfieldYVar2;
memset(_starList, 0, sizeof(_starList));
_starfieldPointDivisor = 150;
_flt_50898 = 50.0;
}
void StarTrekEngine::addR3(R3 *r3) {
for (int i = 0; i < NUM_SPACE_OBJECTS; i++) {
if (_r3List[i] == nullptr) {
_r3List[i] = r3;
return;
}
}
error("addR3: out of shapes.");
}
void StarTrekEngine::delR3(R3 *r3) {
for (int i = 0; i < NUM_SPACE_OBJECTS; i++) {
if (_r3List[i] == r3) {
_r3List[i] = nullptr;
r3->field1e = 0;
return;
}
}
error("delR3: shape not found.");
}
void StarTrekEngine::clearStarfieldPixels() {
_gfx->fillBackgroundRect(_starfieldRect, 0);
}
void StarTrekEngine::drawStarfield() {
int16 var28 = ((_starfieldXVar2 * 3) >> 1);
int16 xvar = var28 / 2;
int16 var2a = ((_starfieldYVar2 * 3) >> 1);
int16 yvar = var2a / 2;
int16 var8 = _starfieldPointDivisor << 3;
FileStream file = loadFile("stars.shp");
for (int i = 0; i < NUM_STARS; i++) {
Star *star = &_starList[i];
if ((i & 0xf) == 0) {
file->seek(0, SEEK_SET);
}
if (!star->active) {
int16 var4 = getRandomWord() / var28 - xvar;
int16 var6 = getRandomWord() / var2a - yvar;
Point3 point = constructPoint3ForStarfield(var4, var6, var8);
star->pos = matrixMult(_starPositionMatrix, point) + _starfieldPosition;
star->active = true;
}
Point3 p = star->pos - _starfieldPosition;
Point3 point2 = matrixMult(p, _starPositionMatrix);
if (point2.z > _flt_50898 && point2.z < 0x3fff
&& abs(point2.x) < point2.z && abs(point2.y) < point2.z) {
int16 x = _starfieldXVar1 + scaleSpacePosition(point2.x, point2.z);
int16 y = _starfieldYVar1 - scaleSpacePosition(point2.y, point2.z);
int fileOffset = file->pos();
file->readUint32();
int16 width = file->readUint16();
int16 height = file->readUint16();
Common::Rect starRect(x, y, x + width, y + height);
Common::Rect drawRect = _starfieldRect.findIntersectingRect(starRect);
file->seek(fileOffset, SEEK_SET);
SharedPtr<Bitmap> bitmap = SharedPtr<Bitmap>(new Bitmap(file));
if (!drawRect.isEmpty())
_gfx->drawBitmapToBackground(starRect, drawRect, bitmap);
bitmap.reset();
} else {
star->active = false;
file->readUint32();
int16 offset2 = file->readUint16() * file->readUint16();
file->seek(file->pos() + offset2, SEEK_SET);
}
}
}
/**
* Compare 2 r3 objects for the purpose of sorting them by layer before drawing.
* FIXME: Original returned an int, not a bool. This may affect the stability of the sort...
*/
bool compareR3Objects(R3 *obj1, R3 *obj2) {
int32 diff = obj1->field54 - obj2->field54;
if (diff < 0)
return true;
else if (diff == 0)
return false; // original would have a distinct value for this
else
return false;
}
void StarTrekEngine::updateStarfieldAndShips(bool arg0) {
bool enterpriseDestroyed = false;
_starfieldSprite.bitmapChanged = true;
_starPositionMatrix = _someMatrix.invert();
clearStarfieldPixels();
drawStarfield();
int numObjects = 0;
for (int i = 0; i < NUM_SPACE_OBJECTS; i++) {
R3 *r3 = _r3List[i];
if (r3 == nullptr)
continue;
r3->field34 = 0;
switch (r3->field1e) { // TODO
case 1:
r3 = sub_19f24(r3);
break;
case 2: // TODO (specifically for the enterprise?)
break;
case 3:
r3 = sub_19f24(r3);
break;
}
if (r3 != nullptr)
_orderedR3List[numObjects++] = r3;
}
if (numObjects != 0) {
Common::sort(_orderedR3List, _orderedR3List + numObjects, &compareR3Objects);
for (int i = 0; i < numObjects; i++) {
R3 *r3 = _orderedR3List[i];
r3->field34 = 1;
switch (r3->field1e) { // TODO
case 1:
break;
case 2:
break;
case 3:
if (r3->field20 == 1) {
// TODO
} else
drawR3Shape(r3);
break;
}
}
}
if (enterpriseDestroyed) {
showTextbox("", "GENE\\SPACE000#The Enterprise has been destroyed!", 20, 20, TEXTCOLOR_YELLOW, 0);
showGameOverMenu();
// FIXME: original game manipulates stack to jump somewhere...
return;
}
// TODO: static on enterprise viewscreen?
}
R3 *StarTrekEngine::sub_19f24(R3 *r3) {
r3->matrix2 = r3->matrix;
r3->field36 = r3->pos;
r3->field36 -= _starfieldPosition;
r3->field54 = r3->field36.getDiagonal();
Point3 point = matrixMult(r3->field36, _starPositionMatrix);
r3->field36 = point;
if (sub_1c022(r3)) {
if (r3->field1e >= 1 && r3->field1e <= 3)
r3->matrix2 *= _starPositionMatrix;
r3->field58 = _starfieldXVar1 + scaleSpacePosition(r3->field36.x, r3->field36.z);
r3->field5a = _starfieldYVar1 - scaleSpacePosition(r3->field36.y, r3->field36.z);
return r3;
} else
return nullptr;
}
void StarTrekEngine::drawR3Shape(R3 *r3) {
if (r3->field1e != 3) // TODO: remove this
return;
if (r3->funcPtr1 != 0) {
// TODO: call it
}
if (r3->shpFile != nullptr) {
r3->shpFile->seek(r3->bitmapOffset, SEEK_SET);
SharedPtr<Bitmap> bitmap(new Bitmap(r3->shpFile));
double dbl68 = ((double)r3->field24 * _starfieldPointDivisor) / r3->field36.z;
double dbl70 = 1.0 / dbl68;
double dbl30 = 1.0;
double dbl28 = 0.0;
double dbl20 = 0.0;
double dbl18 = 1.0;
double dbl60 = 1.0;
double dbl58 = 0.0;
double dbl50 = 0.0;
double dbl48 = 0.0;
switch (r3->field1e) {
case 1: // TODO
break;
case 3:
dbl30 = dbl68;
dbl28 = 0.0;
dbl20 = 0.0;
dbl18 = dbl68;
dbl60 = dbl70;
dbl58 = 0.0;
dbl50 = 0.0;
dbl48 = dbl70;
break;
case 4: // TODO
break;
default: // TODO
break;
}
r3->field80 = dbl60;
r3->field88 = dbl58;
r3->field90 = dbl50;
r3->field98 = dbl48;
// dbl30, (bitmap->xoffset + 2), r3->field58,
double tmp = r3->field58 - (double)(bitmap->xoffset + 2) * dbl30;
// dbl20, (bitmap->yoffset + 2), tmp
double dbl10 = tmp - (double)(bitmap->yoffset + 2) * dbl20;
// dbl28, (bitmap->xoffset + 2), r3->field5a
tmp = r3->field5a - (double)(bitmap->xoffset + 2) * dbl28;
// dbl18, (bitmap->yoffset + 2), tmp
double dbl8 = tmp - (double)(bitmap->yoffset + 2) * dbl18;
// dbl60, r3->field58, bitmap->xoffset + 2
tmp = (bitmap->xoffset + 2) - dbl60 * r3->field58;
double dbl40 = tmp - dbl50 * r3->field5a;
tmp = (bitmap->yoffset + 2) - dbl58 * r3->field58;
double dbl38 = tmp - dbl48 * r3->field5a;
double dbl3e4 = bitmap->width + 2;
double dbl3ec = bitmap->height + 2;
double thing[8];
tmp = 1.0 * dbl30;
thing[0] = 1.0 * dbl20 + tmp + dbl10;
tmp = 1.0 * dbl28;
thing[1] = 1.0 * dbl18 + tmp + dbl8;
tmp = 1.0 * dbl30;
thing[2] = dbl3ec * dbl20 + tmp + dbl10;
tmp = 1.0 * dbl28;
thing[3] = dbl3ec * dbl18 + tmp + dbl8;
thing[4] = dbl3ec * dbl20 + dbl3e4 * dbl30 + dbl10;
thing[5] = dbl3ec * dbl18 + dbl3e4 * dbl28 + dbl8;
thing[6] = 1.0 * dbl20 + dbl3e4 * dbl30 + dbl10;
thing[7] = 1.0 * dbl18 + dbl3e4 * dbl28 + dbl8;
int16 *rightBounds = new int16[SCREEN_HEIGHT];
int16 *leftBounds = new int16[SCREEN_HEIGHT];
for (int y = _starfieldRect.top; y < _starfieldRect.bottom; y++) {
leftBounds[y] = _starfieldRect.right;
rightBounds[y] = _starfieldRect.left - 1;
}
int16 shpImageTop = _starfieldRect.bottom - 1;
int16 shpImageBottom = _starfieldRect.top;
for (int i = 0; i < 4; i++) {
int16 index1 = i;
int16 index2 = (i + 1) & 3;
if (thing[index1 * 2 + 1] > thing[index2 * 2 + 1]) {
index1 = index2;
index2 = i;
}
int16 top = ceil(thing[index1 * 2 + 1]);
int16 bottom = floor(thing[index2 * 2 + 1]);
if (top > bottom)
continue;
if (top > _starfieldRect.bottom - 1)
continue;
if (bottom < _starfieldRect.top)
continue;
if (top < _starfieldRect.top)
top = _starfieldRect.top;
if (bottom > _starfieldRect.bottom - 1)
bottom = _starfieldRect.bottom - 1;
if (top < shpImageTop)
shpImageTop = top;
if (bottom > shpImageBottom)
shpImageBottom = bottom;
double dbl3f4;
if (thing[index2 * 2 + 1] == thing[index1 * 2 + 1])
dbl3f4 = 0.0;
else
dbl3f4 = (thing[index2 * 2] - thing[index1 * 2]) / (thing[index2 * 2 + 1] - thing[index1 * 2 + 1]);
int32 boundDiff = (int32)(0x10000 * dbl3f4); // var3ec
int32 boundBase = (int32)(((top - thing[index1 * 2 + 1]) * dbl3f4 + thing[index1 * 2]) * 0x10000); // var3e8
for (int y = top; y <= bottom; y++) {
int16 rightBound = boundBase >> 16; // var3f6
int16 leftBound = (boundBase + 0xffff) >> 16; // var3f8
if (leftBound < _starfieldRect.left)
leftBound = _starfieldRect.left;
if (leftBound < leftBounds[y])
leftBounds[y] = leftBound;
if (rightBound > _starfieldRect.right - 1)
rightBound = _starfieldRect.right - 1;
if (rightBound > rightBounds[y])
rightBounds[y] = rightBound;
boundBase += boundDiff;
}
}
while (shpImageTop <= shpImageBottom) {
if (leftBounds[shpImageTop] > rightBounds[shpImageTop])
shpImageTop++;
else
break;
}
while (shpImageTop <= shpImageBottom) {
if (leftBounds[shpImageBottom] > rightBounds[shpImageBottom])
shpImageBottom--;
else
break;
}
if (shpImageTop <= shpImageBottom) {
bool var3fa = false;
if (r3->field1e == 2) {
// TODO
} else
var3fa = (((r3->field24 * _starfieldPointDivisor) << 1) / 3 <= r3->field36.z);
if (!var3fa) {
if (r3->field1e == 3) {
// Is this used anywhere?
//uint16 var3fc = (_frameIndex << 3) ^ _frameIndex;
} else {
// TODO
}
}
// Amount added to X/Y positions after each pixel is drawn
int16 xDiff = (int16)(dbl60 * 256);
int16 yDiff = (int16)(dbl58 * 256);
int16 var3f2 = (int16)(dbl50 * 256);
int16 var3f4 = (int16)(dbl48 * 256);
int16 var3f6 = var3f2 * shpImageTop + (int16)(dbl40 * 256);
int16 var3f8 = var3f4 * shpImageTop + (int16)(dbl38 * 256);
Bitmap tmpBitmap(256, 249);
byte *otherBuffer = new byte[256 * 256];
int16 bitmapWidth = bitmap->width;
int16 bitmapHeight = bitmap->height;
if (bitmapHeight > 245)
error("Shape height too big in drawR3Shape!");
if (bitmapWidth > 252)
error("Shape width too big in drawR3Shape!");
for (int i = 0; i < 2; i++)
memset(otherBuffer + i * 256, 0, bitmapWidth + 4);
for (int i = 0; i < 2; i++)
memset(otherBuffer + (bitmapHeight + 2 + i) * 256, 0, bitmapWidth + 4);
for (int i = 0; i < bitmapHeight; i++) {
otherBuffer[512 + i * 256 + 0] = 0;
otherBuffer[512 + i * 256 + 1] = 0;
otherBuffer[512 + i * 256 + bitmapWidth + 2] = 0;
otherBuffer[512 + i * 256 + bitmapWidth + 3] = 0;
}
if (r3->field1e == 2) {
// TODO
} else
_gfx->copyRectBetweenBitmaps(&tmpBitmap, 2, 2, bitmap.get(), 0, 0, bitmapWidth, bitmapHeight);
byte *bgPixels = _gfx->getBackgroundPixels() + shpImageTop * SCREEN_WIDTH;
for (int y = shpImageTop; y <= shpImageBottom; y++) {
int16 leftBound = leftBounds[y];
int16 rowWidth = rightBounds[y] - leftBound;
int16 srcX = leftBound * xDiff + var3f6;
int16 srcY = leftBound * yDiff + var3f8;
var3f6 += var3f2;
var3f8 += var3f4;
byte *bgPixels2 = bgPixels + leftBound;
bgPixels += SCREEN_WIDTH;
if (rowWidth == 0)
continue;
if (var3fa) {
srcX += 0x80;
srcY += 0x80;
int16 cx = srcX;
int16 bx = srcY;
byte *di = bgPixels2;
for (int a = 0; a < rowWidth; a++) {
byte b = tmpBitmap.pixels[(bx & 0xff00) + (cx >> 8)];
cx += xDiff;
bx += yDiff;
if (b == 0)
di++;
else
*(di++) = b;
}
} else {
warning("Unimplemented branch in \"drawR3Shape\"");
}
}
delete[] otherBuffer;
}
delete[] rightBounds;
delete[] leftBounds;
}
if (r3->funcPtr2 != 0) {
// TODO: call it
}
}
bool StarTrekEngine::sub_1c022(R3 *r3) {
Point3 point = r3->field36;
if (point.z < _flt_50898)
return false;
return true; // TODO: finish this properly
}
Point3 StarTrekEngine::constructPoint3ForStarfield(int16 x, int16 y, int16 z) {
Point3 point;
point.z = z;
point.y = y * z / _starfieldPointDivisor;
point.x = x * z / _starfieldPointDivisor;
return point;
}
Point3 StarTrekEngine::matrixMult(const Matrix &weight, const Point3 &point) {
Point3 p;
for (int i = 0; i < 3; i++) {
p[i] = 0;
for (int j = 0; j < 3; j++)
p[i] += (int16)weight[i][j].multToInt(point[j]);
}
return p;
}
Point3 StarTrekEngine::matrixMult(const Point3 &point, const Matrix &weight) {
Point3 p = Point3();
for (int i = 0; i < 3; i++) {
p[i] = 0;
for (int j = 0; j < 3; j++)
p[i] += (int16)weight[j][i].multToInt(point[j]);
}
return p;
}
int32 StarTrekEngine::scaleSpacePosition(int32 x, int32 z) {
return (x * _starfieldPointDivisor) / z;
}
Matrix StarTrekEngine::initMatrix() {
Matrix mat;
mat[0][0] = 1.0;
mat[1][1] = 1.0;
mat[2][2] = 1.0;
return mat;
}
Matrix StarTrekEngine::initSpeedMatrixForXZMovement(Angle angle, const Matrix &matrix) {
Fixed14 sinVal = sin(angle);
Fixed14 cosVal = cos(angle);
Matrix matrix1 = initMatrix();
matrix1[0].x = cosVal;
matrix1[0].z = -sinVal;
matrix1[2].x = sinVal;
matrix1[2].z = cosVal;
return matrix * matrix1;
}
} // End of namespace StarTrek
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