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Add zBuffer

This commit is contained in:
Miloslav Číž 2019-10-07 01:18:42 +02:00
parent 9e154867f4
commit 4a60464f1e
1 changed files with 34 additions and 13 deletions
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47
main.c
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@ -131,6 +131,8 @@ void SFG_init();
#define SFG_GRAVITY_SPEED_INCREASE_PER_FRAME 1
#endif
uint16_t SFG_zBuffer[SFG_GAME_RESOLUTION_X];
/**
Step in which walls get higher, in raycastlib units.
*/
@ -305,6 +307,9 @@ void SFG_pixelFunc(RCL_PixelInfo *pixel)
uint8_t color;
uint8_t shadow = 0;
if (pixel->position.y == SFG_GAME_RESOLUTION_Y / 2)
SFG_zBuffer[pixel->position.x] = pixel->depth;
if (pixel->isHorizon && pixel->depth > RCL_UNITS_PER_SQUARE * 16)
{
color = SFG_TRANSPARENT_COLOR;
@ -395,12 +400,13 @@ void SFG_pixelFunc(RCL_PixelInfo *pixel)
uint8_t SFG_spriteSamplingPoints[SFG_MAX_SPRITE_SIZE];
void SFG_drawScaledImage(
void SFG_drawScaledSprite(
const uint8_t *image,
int16_t centerX,
int16_t centerY,
int16_t size,
uint8_t minusValue)
uint8_t minusValue,
RCL_Unit distance)
{
if ((size > SFG_MAX_SPRITE_SIZE) || (size == 0))
return;
@ -479,21 +485,33 @@ void SFG_drawScaledImage(
#undef PRECOMP_SCALE
for (int16_t x = x0, u = u0; x <= x1; ++x, ++u)
for (int16_t y = y0, v = v0; y <= y1; ++y, ++v)
{
if (SFG_zBuffer[x] > distance)
{
uint8_t color =
SFG_getTexel(image,SFG_spriteSamplingPoints[u],
SFG_spriteSamplingPoints[v]);
int8_t columnTransparent = 1;
if (color != SFG_TRANSPARENT_COLOR)
for (int16_t y = y0, v = v0; y <= y1; ++y, ++v)
{
#if SFG_DIMINISH_SPRITES
color = palette_minusValue(color,minusValue);
#endif
uint8_t color =
SFG_getTexel(image,SFG_spriteSamplingPoints[u],
SFG_spriteSamplingPoints[v]);
SFG_setGamePixel(x,y,color);
if (color != SFG_TRANSPARENT_COLOR)
{
#if SFG_DIMINISH_SPRITES
color = palette_minusValue(color,minusValue);
#endif
columnTransparent = 0;
SFG_setGamePixel(x,y,color);
}
}
if (!columnTransparent)
SFG_zBuffer[x] = distance;
}
}
}
RCL_Unit SFG_texturesAt(int16_t x, int16_t y)
@ -864,6 +882,9 @@ void SFG_gameStep()
void SFG_draw()
{
for (uint16_t i = 0; i < SFG_GAME_RESOLUTION_X; ++i)
SFG_zBuffer[i] = 65535;
RCL_renderComplex(
SFG_player.camera,
SFG_floorHeightAt,
@ -895,9 +916,9 @@ void SFG_draw()
SFG_player.camera);
if (p.depth > 0)
SFG_drawScaledImage(SFG_sprites[0],p.position.x,p.position.y,
SFG_drawScaledSprite(SFG_sprites[0],p.position.x,p.position.y,
RCL_perspectiveScale(SFG_GAME_RESOLUTION_Y / 2,p.depth),
p.depth / (RCL_UNITS_PER_SQUARE * 2));
p.depth / (RCL_UNITS_PER_SQUARE * 2),p.depth);
}
}