317 lines
8.8 KiB
C++
317 lines
8.8 KiB
C++
/*---------------------------------------------------------------------------------
|
|
a simple rotating cube demo by tkcne
|
|
---------------------------------------------------------------------------------*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <malloc.h>
|
|
#include <math.h>
|
|
#include <gccore.h>
|
|
#include <gcmodplay.h>
|
|
#include <debug.h>
|
|
#include <ogcsys.h>
|
|
|
|
#define DEFAULT_FIFO_SIZE (256*1024) //GX_FIFO_MINSIZE
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// cube vertex data
|
|
//---------------------------------------------------------------------------------
|
|
s16 cube[] ATTRIBUTE_ALIGN(32) = {
|
|
// x y z
|
|
-15, 15, -15, // 0
|
|
15, 15, -15, // 1
|
|
15, 15, 15, // 2
|
|
-15, 15, 15, // 3
|
|
15, -15, -15, // 4
|
|
15, -15, 15, // 5
|
|
-15, -15, 15, // 6
|
|
-15, -15, -15, // 7
|
|
};
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// color data
|
|
//---------------------------------------------------------------------------------
|
|
u8 colors[] ATTRIBUTE_ALIGN(32) = {
|
|
// r, g, b, a
|
|
100, 10, 100, 255, // 0 purple
|
|
240, 0, 0, 255, // 1 red
|
|
255, 180, 0, 255, // 2 orange
|
|
255, 255, 0, 255, // 3 yellow
|
|
10, 120, 40, 255, // 4 green
|
|
0, 20, 100, 255 // 5 blue
|
|
};
|
|
|
|
u32
|
|
CvtRGB (u8 r1, u8 g1, u8 b1, u8 r2, u8 g2, u8 b2)
|
|
{
|
|
int y1, cb1, cr1, y2, cb2, cr2, cb, cr;
|
|
|
|
y1 = (299 * r1 + 587 * g1 + 114 * b1) / 1000;
|
|
cb1 = (-16874 * r1 - 33126 * g1 + 50000 * b1 + 12800000) / 100000;
|
|
cr1 = (50000 * r1 - 41869 * g1 - 8131 * b1 + 12800000) / 100000;
|
|
|
|
y2 = (299 * r2 + 587 * g2 + 114 * b2) / 1000;
|
|
cb2 = (-16874 * r2 - 33126 * g2 + 50000 * b2 + 12800000) / 100000;
|
|
cr2 = (50000 * r2 - 41869 * g2 - 8131 * b2 + 12800000) / 100000;
|
|
|
|
cb = (cb1 + cb2) >> 1;
|
|
cr = (cr1 + cr2) >> 1;
|
|
|
|
return (y1 << 24) | (cb << 16) | (y2 << 8) | cr;
|
|
}
|
|
|
|
static u32 curr_fb = 0;
|
|
static u32 first_frame = 1;
|
|
static u32 *xfb[2] = {NULL,NULL};
|
|
GXRModeObj *rmode;
|
|
|
|
void draw_init();
|
|
void draw_cube(Mtx v);
|
|
|
|
//---------------------------------------------------------------------------------
|
|
int main( int argc, char **argv ){
|
|
//---------------------------------------------------------------------------------
|
|
f32 yscale;
|
|
u32 xfbHeight;
|
|
u32 colour1;
|
|
Mtx v,p; // view and perspective matrices
|
|
int CP = 0;
|
|
GXColor background = {0, 0, 0, 0xff};
|
|
int startx, starty;
|
|
int directionx, directiony;
|
|
|
|
// init the vi. setup frame buffer and set the retrace callback
|
|
// to copy the efb to xfb
|
|
VIDEO_Init();
|
|
PAD_Init();
|
|
|
|
rmode = VIDEO_GetPreferredMode(NULL);
|
|
|
|
|
|
curr_fb = 0;
|
|
first_frame = 0;
|
|
|
|
// setup the fifo and then init the flipper
|
|
void *gp_fifo = NULL;
|
|
gp_fifo = memalign(32,DEFAULT_FIFO_SIZE);
|
|
memset(gp_fifo,0,DEFAULT_FIFO_SIZE);
|
|
|
|
xfb[0] = (u32 *) MEM_K0_TO_K1(SYS_AllocateFramebuffer(rmode));
|
|
xfb[1] = (u32 *) MEM_K0_TO_K1(SYS_AllocateFramebuffer(rmode));
|
|
|
|
VIDEO_Configure(rmode);
|
|
VIDEO_SetNextFramebuffer(xfb[curr_fb]);
|
|
if(!first_frame) VIDEO_SetBlack(FALSE);
|
|
VIDEO_Flush();
|
|
VIDEO_WaitVSync();
|
|
if(rmode->viTVMode&VI_NON_INTERLACE) VIDEO_WaitVSync();
|
|
console_init(xfb[curr_fb],20,20,rmode->fbWidth,rmode->xfbHeight,rmode->fbWidth*VI_DISPLAY_PIX_SZ);
|
|
|
|
//curr_fb ^= 1;
|
|
|
|
GX_Init(gp_fifo,DEFAULT_FIFO_SIZE);
|
|
|
|
// clears the bg to color and clears the z buffer
|
|
GX_SetCopyClear(background, 0x00ffffff);
|
|
|
|
// other gx setup
|
|
GX_SetViewport(0,0,rmode->fbWidth,rmode->efbHeight,0,1);
|
|
yscale = GX_GetYScaleFactor(rmode->efbHeight,rmode->xfbHeight);
|
|
xfbHeight = GX_SetDispCopyYScale(yscale);
|
|
GX_SetScissor(0,0,rmode->fbWidth,rmode->efbHeight);
|
|
GX_SetDispCopySrc(0,0,rmode->fbWidth,rmode->efbHeight);
|
|
GX_SetDispCopyDst(rmode->fbWidth,xfbHeight);
|
|
GX_SetCopyFilter(rmode->aa,rmode->sample_pattern,GX_TRUE,rmode->vfilter);
|
|
GX_SetFieldMode(rmode->field_rendering,((rmode->viHeight==2*rmode->xfbHeight)?GX_ENABLE:GX_DISABLE));
|
|
|
|
// cull none because other values produce weird results
|
|
GX_SetCullMode(GX_CULL_NONE);
|
|
GX_CopyDisp(xfb[curr_fb],GX_TRUE);
|
|
GX_SetDispCopyGamma(GX_GM_1_0);
|
|
|
|
// setup our camera at the origin
|
|
// looking down the -z axis with y up
|
|
Vector cam = {0.0F, 0.0F, 0.0F},
|
|
up = {0.0F, 1.0F, 0.0F},
|
|
look = {0.0F, 0.0F, -1.0F};
|
|
guLookAt(v, &cam, &up, &look);
|
|
|
|
// setup our projection matrix
|
|
// this creates a perspective matrix with a view angle of 60,
|
|
// an aspect ratio of 4/3 (i'm not sure if that's the right
|
|
// way to do it but i just went by what made a square on my screen)
|
|
// and z near and far distances
|
|
f32 w = rmode->viWidth;
|
|
f32 h = rmode->viHeight;
|
|
guPerspective(p, 60, (f32)w/h, 10.0F, 300.0F);
|
|
GX_LoadProjectionMtx(p, GX_PERSPECTIVE);
|
|
|
|
GXColor Test = { 192, 255, 0, 255 };
|
|
GX_SetFog(GX_FOG_EXP2, 1, 2, 3, 4, Test);
|
|
GXFogAdjTbl bum;
|
|
GX_SetFogRangeAdj(GX_ENABLE, 255, &bum);
|
|
// setup vertexes
|
|
draw_init();
|
|
|
|
colour1 = CvtRGB (0xff, 0xff, 0xff, 0xff, 0xff, 0xff);
|
|
// main loop
|
|
while(1) {
|
|
|
|
PAD_ScanPads();
|
|
|
|
if (PAD_ButtonsDown(0) & PAD_BUTTON_START) {
|
|
void (*reload)() = (void(*)())0x90000020;
|
|
reload();
|
|
}
|
|
|
|
// do this before drawing
|
|
GX_SetViewport(0,0,rmode->fbWidth,rmode->efbHeight,0,1);
|
|
GX_InvVtxCache();
|
|
GX_InvalidateTexAll();
|
|
GX_SetScissor(640 , 480,680 , 560);
|
|
GX_SetScissorBoxOffset(-80, -80);
|
|
|
|
// draw our cube
|
|
draw_cube(v);
|
|
|
|
GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
|
|
GX_SetColorUpdate(GX_TRUE);
|
|
GX_CopyDisp(xfb[curr_fb],GX_TRUE);
|
|
|
|
// do this stuff after drawing
|
|
GX_DrawDone();
|
|
/*** Draw Bouncing Square ***/
|
|
if (directionx)
|
|
startx -= 4;
|
|
else
|
|
startx += 4;
|
|
|
|
if (directiony)
|
|
starty -= 2;
|
|
else
|
|
starty += 2;
|
|
|
|
if (startx >= 576) directionx = 1;
|
|
|
|
if (starty >= (rmode->xfbHeight - 64)) directiony = 1;
|
|
|
|
if (startx < 0) {
|
|
startx = 0;
|
|
directionx = 0;
|
|
}
|
|
|
|
if (starty < 0) {
|
|
starty = 0;
|
|
directiony = 0;
|
|
}
|
|
|
|
CP = (starty * 320) + (startx >> 1);
|
|
for (int rows = 0; rows < 64; rows++) {
|
|
for (int cols = 0; cols < 32; cols++)
|
|
xfb[curr_fb][CP + cols] = colour1;
|
|
|
|
CP += 320;
|
|
}
|
|
VIDEO_SetNextFramebuffer(xfb[curr_fb]);
|
|
|
|
if(first_frame) {
|
|
first_frame = 0;
|
|
VIDEO_SetBlack(FALSE);
|
|
}
|
|
VIDEO_Flush();
|
|
|
|
VIDEO_WaitVSync();
|
|
curr_fb ^= 1;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------------------------------
|
|
void draw_init() {
|
|
//---------------------------------------------------------------------------------
|
|
// setup the vertex descriptor
|
|
// tells the flipper to expect 8bit indexes for position
|
|
// and color data. could also be set to direct.
|
|
GX_ClearVtxDesc();
|
|
GX_SetVtxDesc(GX_VA_POS, GX_INDEX8);
|
|
GX_SetVtxDesc(GX_VA_CLR0, GX_INDEX8);
|
|
|
|
// setup the vertex attribute table
|
|
// describes the data
|
|
// args: vat location 0-7, type of data, data format, size, scale
|
|
// so for ex. in the first call we are sending position data with
|
|
// 3 values X,Y,Z of size S16. scale sets the number of fractional
|
|
// bits for non float data.
|
|
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0);
|
|
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
|
|
|
|
// tells gx where our position and color data is
|
|
// args: type of data, pointer, array stride
|
|
GX_SetArray(GX_VA_POS, cube, 3*sizeof(s16));
|
|
GX_SetArray(GX_VA_CLR0, colors, 4*sizeof(u8));
|
|
DCFlushRange(cube,sizeof(cube));
|
|
DCFlushRange(colors,sizeof(colors));
|
|
|
|
// no idea...sets to no textures
|
|
// i don't know anything about textures or lighting yet :|
|
|
GX_SetNumChans(1);
|
|
GX_SetNumTexGens(0);
|
|
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORDNULL, GX_TEXMAP_NULL, GX_COLOR0A0);
|
|
GX_SetTevOp(GX_TEVSTAGE0, GX_PASSCLR);
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------------------------------
|
|
// draws a quad from 4 vertex idx and one color idx
|
|
//---------------------------------------------------------------------------------
|
|
void draw_quad(u8 v0, u8 v1, u8 v2, u8 v3, u8 c) {
|
|
//---------------------------------------------------------------------------------
|
|
// one 8bit position idx
|
|
GX_Position1x8(v0);
|
|
// one 8bit color idx
|
|
GX_Color1x8(c);
|
|
GX_Position1x8(v1);
|
|
GX_Color1x8(c);
|
|
GX_Position1x8(v2);
|
|
GX_Color1x8(c);
|
|
GX_Position1x8(v3);
|
|
GX_Color1x8(c);
|
|
}
|
|
|
|
|
|
//---------------------------------------------------------------------------------
|
|
void draw_cube(Mtx v) {
|
|
//---------------------------------------------------------------------------------
|
|
Mtx m; // model matrix.
|
|
Mtx mv; // modelview matrix.
|
|
Vector axis = {-1,1,0};
|
|
static float rotateby = 0;
|
|
|
|
rotateby ++;
|
|
|
|
// move the cube out in front of us and rotate it
|
|
guMtxIdentity(m);
|
|
guMtxRotAxisDeg(m, &axis, rotateby);
|
|
guMtxTransApply(m, m, -100.0F, -60.0F, -200.0F);
|
|
guMtxConcat(v,m,mv);
|
|
// load the modelview matrix into matrix memory
|
|
GX_LoadPosMtxImm(mv, GX_PNMTX0);
|
|
|
|
// drawing begins!
|
|
// tells the flipper what type of primitive we will be drawing
|
|
// which descriptor in the VAT to use and the number of vertices
|
|
// to expect. 24 since we will draw 6 quads with 4 verts each.
|
|
GX_Begin(GX_QUADS, GX_VTXFMT0, 24);
|
|
|
|
draw_quad(0, 3, 2, 1, 0);
|
|
draw_quad(0, 7, 6, 3, 1);
|
|
draw_quad(0, 1, 4, 7, 2);
|
|
draw_quad(1, 2, 5, 4, 3);
|
|
draw_quad(2, 3, 6, 5, 4);
|
|
draw_quad(4, 7, 6, 5, 5);
|
|
|
|
GX_End();
|
|
}
|