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Lectem 2015-03-24 00:07:41 +01:00
commit 2c5b765575
2 changed files with 26 additions and 6 deletions
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2
examples/graphics/hello_triangle/data/shader.vsh
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@ -26,7 +26,7 @@
dp4 outpos.z, projection[2], r0
dp4 outpos.w, projection[3], r0
; Set vertex color to white
; Set vertex color to white rgba => (1.0,1.0,1.0,1.0)
mov outclr, ones
end
.end

30
examples/graphics/hello_triangle/source/main.c
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@ -1,3 +1,14 @@
/**
* Hello Triangle example, made by Lectem
*
* Draws a white triangle using the 3DS GPU.
* This example should give you enough hints and links on how to use the GPU for basic non-textured rendering.
* Another version of this example will be made with colors.
*
* Thanks to smea, fincs, neobrain, xerpi and all those who helped me understand how the 3DS GPU works
*/
#include <3ds.h>
#include <stdio.h>
#include <stdlib.h>
@ -7,6 +18,10 @@
#include "mmath.h"
/**
* Crappy assert stuff that lets you go back to hbmenu by pressing start.
*/
#define STRINGIZE(x) STRINGIZE2(x)
#define STRINGIZE2(x) #x
#define LINE_STRING STRINGIZE(__LINE__)
@ -21,7 +36,7 @@ void _my_assert(char * text)
gfxSwapBuffers();
gspWaitForVBlank();
}while(aptMainLoop());
exit(0);
//should stop the program and clean up our mess
}
@ -127,10 +142,12 @@ void gpuUIEndFrame()
GPU_FinishDrawing();
GPUCMD_Finalize();
GPUCMD_FlushAndRun(NULL);
gspWaitForP3D();
//Draw the screen
gspWaitForP3D();//Wait for the gpu 3d processing to be done
//Copy the GPU output buffer to the screen framebuffer
//See http://3dbrew.org/wiki/GPU#Transfer_Engine for more details about the transfer engine
GX_SetDisplayTransfer(NULL, gpuFBuffer, 0x019001E0, (u32*)gfxGetFramebuffer(GFX_TOP, GFX_LEFT, NULL, NULL), 0x019001E0, 0x01001000);
gspWaitForPPF();
//Clear the screen
GX_SetMemoryFill(NULL, gpuFBuffer, clearColor, &gpuFBuffer[0x2EE00],
0x201, gpuDBuffer, 0x00000000, &gpuDBuffer[0x2EE00], 0x201);
@ -146,7 +163,10 @@ void gpuUIEndFrame()
//Viewport (http://3dbrew.org/wiki/GPU_Commands#Command_0x0041)
GPU_SetViewport((u32 *)osConvertVirtToPhys((u32)gpuDBuffer),
(u32 *)osConvertVirtToPhys((u32)gpuFBuffer),
0, 0, 240*2, 400); //Our screen is 400*240, and we actually have 2 framebuffers, even without 3D mode activated
0, 0,
//Our screen is 400*240, but the GPU actually renders to 400*480 and then downscales it SetDisplayTransfer bit 24 is set
//This is the case here (See http://3dbrew.org/wiki/GPU#0x1EF00C10 for more details)
240*2, 400);
GPU_DepthMap(-1.0f, 0.0f); //Be careful, standard OpenGL clipping is [-1;1], but it is [-1;0] on the pica200
@ -207,7 +227,7 @@ int main(int argc, char** argv)
1, // number of attributes
(u32 *) osConvertVirtToPhys((u32) triangle_data),
GPU_ATTRIBFMT(0, 3, GPU_FLOAT),//We only have vertices
0xFFFE,//Attribute mask, in our case 0b1110
0xFFFE,//Attribute mask, in our case 0b1110 since we use only the first one
0x0,//Attribute permutations (here it is the identity)
1, //number of buffers
(u32[]) {0x0}, // buffer offsets (placeholders)