broke everything to remove bmp
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d13287996c
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a2d95fd15c
231
src/main.c
231
src/main.c
@ -4,10 +4,23 @@
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#define TABLE_LENGTH 720
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#define SPEED 5
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#define FRAC_BITS 8
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#define TILE_WIDTH 8
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#define TILE_HEIGHT 8
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#define TILE_SIZE (TILE_WIDTH * TILE_HEIGHT / 2)
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#define SCREEN_WIDTH 320
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#define SCREEN_HEIGHT 224
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#define SCREEN_TILES_X 40
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#define SCREEN_TILES_Y 28
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#define TILE_EMPTY 0
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#define TILE_FILLED 1
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#define MAP_WIDTH 10
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#define MAP_HEIGHT 10
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Line l;
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s16 angle = 0;
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s16 x, y;
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u8 tileBuffer[TILE_SIZE];
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u16 tileIndex = 0;
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const u8 map[10][10] = {{1,1,1,1,1,1,1,1,1,1},
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@ -89,7 +102,7 @@ void castRay(s16 angle){
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s16 vx = l.pt1.x << FRAC_BITS;
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s16 vy = l.pt1.y << FRAC_BITS;
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s16 nTan = -tan;
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s16 threshold = (20 << FRAC_BITS);
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threshold = (20 << FRAC_BITS);
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if(nTan > threshold){
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nTan = threshold;
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}
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@ -144,128 +157,114 @@ void castRay(s16 angle){
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}
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void mapscan(){
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u8 mapcolor = 12;
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mapcolor |= mapcolor << 4;
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int mapscale = 10;
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for(u8 x = 0; x < 10; x++){
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for(u8 y = 0; y < 10; y++){
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if(map[y][x] == 1){
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Vect2D_s16 mapverts[4] = {{x*mapscale,y*mapscale},{(x+1)*mapscale,y*mapscale},{(x+1)*mapscale,(y+1)*mapscale},{x*mapscale,(y+1)*mapscale}};
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BMP_drawPolygon(mapverts, 4, mapcolor);
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}
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}
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}
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void initTileBuffer(u8 color) {
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u8 colorValue = (color << 4) | color; // Color for both nibbles
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for (int i = 0; i < TILE_SIZE; i++) {
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tileBuffer[i] = colorValue;
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}
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}
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void render(){
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l.pt1.x = x / 10;
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l.pt1.y = y / 10;
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//Clear the bitmap
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BMP_clear();
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//Draw the line defined above (in the background, hidden)
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mapscan();
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if(angle >= 360) angle = angle - 360;
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if(angle < 0) angle = 360 + angle;
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castRay(angle-20);
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BMP_drawLine(&l);
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castRay(angle-10);
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BMP_drawLine(&l);
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for (int i = 0; i < 16; i++){
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castRay(angle);
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BMP_drawLine(&l);
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}
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castRay(angle+10);
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BMP_drawLine(&l);
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castRay(angle+20);
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BMP_drawLine(&l);
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BMP_showFPS(0);
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//Flip the data to the screen - i.e. actually draw the complete image on screen
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BMP_flip(1);
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//Increment the destination y coordinate
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//l.pt2.y = l.pt2.y + 2;
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//Reset the destination y coordinate if it hits 160
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//if (l.pt2.y == 160)
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//{
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//l.pt2.y = 0;
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//}
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SYS_doVBlankProcess();
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void uploadTileDataToVRAM(u16 vramTileIndex) {
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VDP_loadTileData(tileBuffer, vramTileIndex, 1, DMA); // Load 1 tile to VRAM
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}
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void update(){
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u16 joy = JOY_readJoypad(JOY_1);
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if(joy & BUTTON_LEFT) {
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//l.pt1.x -= SPEED;
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angle -= 1;
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}
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if(joy & BUTTON_RIGHT) {
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//l.pt1.x += SPEED;
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angle += 1;
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}
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if(joy & BUTTON_UP) {
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s16 ind = (int)((float)angle/360.0f*1024.0f);
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fix16 dy = sinFix16(ind);
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fix16 dx = cosFix16(ind);
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y += fix16ToInt(fix16Mul(dy, FIX16(SPEED)));
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x += fix16ToInt(fix16Mul(dx, FIX16(SPEED)));
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}
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if(joy & BUTTON_DOWN) {
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s16 ind = (int)((float)angle/360.0f*1024.0f);
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fix16 dy = sinFix16(ind);
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fix16 dx = cosFix16(ind);
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y -= fix16ToInt(fix16Mul(dy, FIX16(SPEED)));
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x -= fix16ToInt(fix16Mul(dx, FIX16(SPEED)));
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}
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void mapscan() {
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u8 mapcolor = 12; // map color
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mapcolor |= mapcolor << 4;
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for (u8 x = 0; x < 10; x++) {
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for (u8 y = 0; y < 10; y++) {
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if (map[y][x] == 1) {
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// Draw a filled tile for the map block
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for (u8 px = 0; px < TILE_WIDTH; px++) {
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for (u8 py = 0; py < TILE_HEIGHT; py++) {
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setPixelInBuffer(px, py, mapcolor);
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}
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}
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// Upload the filled tile to VRAM
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uploadTileDataToVRAM(tileIndex);
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VDP_setTileMapXY(VDP_BG_A, tileIndex, x, y);
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}
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}
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}
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}
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void initVDP(){
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SYS_disableInts();
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VDP_setPlaneSize(64,32,TRUE);
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SYS_enableInts();
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void clearScreenWithTile(u16 tileIndex) {
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// Fill the entire screen with the background tile
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VDP_fillTileMapRect(BG_A, TILE_ATTR_FULL(PAL1, 0, FALSE, FALSE, tileIndex), 0, 0, SCREEN_TILES_X, SCREEN_TILES_Y);
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}
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int main()
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{
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x = 150;
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y = 150;
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initVDP();
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//Initialise the bitmap engine
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BMP_init(FALSE, BG_A, PAL0, FALSE);
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//Set the colour of the line. We are using pallete 0 for the bitmap, so we have 0->15. 15 is used for white text, so we set an unused pallet colour, 14 to blue - RGB 0000FF.
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u16 colour_blue = RGB24_TO_VDPCOLOR(0x0000ff);
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u16 colour_red = RGB24_TO_VDPCOLOR(0x756a4a);
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PAL_setColor(14, colour_blue);
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PAL_setColor(13, colour_red);
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PAL_setColor(12, RGB24_TO_VDPCOLOR(0x00ff00));
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PAL_setColor(15, RGB24_TO_VDPCOLOR(0xff0000));
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VDP_setBackgroundColor(13);
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//A line needs a source coordinate x,y and a destination coordinate x,y along with a pallete colour.
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l.pt1.x = 15;
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l.pt1.y = 15;
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l.pt2.x = 255;
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l.pt2.y = 0;
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l.col = 14;
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l.col |= l.col << 4; // if we do not left shift the colour, we get gaps in the line
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while(TRUE)
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{
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render();
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update();
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}
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return 0;
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void drawMap() {
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for (u16 y = 0; y < MAP_HEIGHT; y++) {
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for (u16 x = 0; x < MAP_WIDTH; x++) {
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u8 tileType = map[y][x] ? TILE_FILLED : TILE_EMPTY;
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VDP_setTileMapXY(BG_A, TILE_ATTR_FULL(PAL1, 0, FALSE, FALSE, tileType), x, y);
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}
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}
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}
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void render() {
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clearScreenWithTile(TILE_EMPTY);
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initTileBuffer(12); // map color
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uploadTileDataToVRAM(TILE_FILLED);
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initTileBuffer(0); // background color
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uploadTileDataToVRAM(TILE_EMPTY);
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drawMap();
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VDP_setTextPlane(BG_B);
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VDP_setTextPalette(2);
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VDP_showFPS(0);
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SYS_doVBlankProcess();
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}
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void update() {
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u16 joy = JOY_readJoypad(JOY_1);
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if (joy & BUTTON_LEFT) {
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angle -= 1;
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}
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if (joy & BUTTON_RIGHT) {
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angle += 1;
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}
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if (joy & BUTTON_UP) {
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s16 ind = (int)((float)angle / 360.0f * 1024.0f);
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fix16 dy = sinFix16(ind);
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fix16 dx = cosFix16(ind);
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y += fix16ToInt(fix16Mul(dy, FIX16(SPEED)));
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x += fix16ToInt(fix16Mul(dx, FIX16(SPEED)));
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}
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if (joy & BUTTON_DOWN) {
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s16 ind = (int)((float)angle / 360.0f * 1024.0f);
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fix16 dy = sinFix16(ind);
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fix16 dx = cosFix16(ind);
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y -= fix16ToInt(fix16Mul(dy, FIX16(SPEED)));
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x -= fix16ToInt(fix16Mul(dx, FIX16(SPEED)));
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}
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}
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void initVDP() {
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SYS_disableInts();
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VDP_setPlaneSize(64, 32, TRUE);
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SYS_enableInts();
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}
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int main() {
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SYS_disableInts();
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VDP_setPlaneSize(64, 32, TRUE);
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SYS_enableInts();
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PAL_setColor(14, RGB24_TO_VDPCOLOR(0x0000ff));
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PAL_setColor(15, RGB24_TO_VDPCOLOR(0xff0000));
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VDP_setBackgroundColor(14);
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// Initialize and upload tile data for TILE_EMPTY and TILE_FILLED
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initTileBuffer(12); // Color for TILE_FILLED
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VDP_loadTileData(tileBuffer, TILE_FILLED, 1, DMA);
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initTileBuffer(0); // Color for TILE_EMPTY
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VDP_loadTileData(tileBuffer, TILE_EMPTY, 1, DMA);
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while (TRUE) {
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render();
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}
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return 0;
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}
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