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//////////////////////////////////////////////////////////////////////////// // triangle.c - DirectX pure mode example //////////////////////////////////////////////////////////////////////////// #include #include #include // define a 2D vertex struct typedef struct VERTEX_FLAT { float x,y,z; float rhw; D3DCOLOR color; } VERTEX_FLAT; #define D3DFVF_FLAT (D3DFVF_XYZRHW | D3DFVF_DIFFUSE) function main() { vec_set(screen_color,vector(50,1,1)); // dark blue nontransparent screen vec_set(screen_size,vector(500,500,0)); video_window(NULL,NULL,0,"Pure Mode DirectX Sample"); // define and preset the triangle VERTEX_FLAT vf[3]; vf[0].color = 0xFFFF0000; // the red corner vf[1].color = 0xFF0000FF; // the blue corner vf[2].color = 0xFF00FF00; // the green corner vf[0].rhw = vf[1].rhw = vf[2].rhw = 1.0; // no perspective // define three corner vectors VECTOR v[3]; vec_set(v[0],vector(100,100,0)); vec_set(v[1],vector(400,100,0)); vec_set(v[2],vector(400,400,0)); // define the rotation center VECTOR center; vec_set(center,vector(250,250,0)); wait(1); //wait until the D3D Device is opened after the first frame // draw a red/blue/green rotating triangle var angle = 0; while(1) { // rotate the corner vectors int i; for (i=0; i<3; i++) { VECTOR vTemp; vec_diff(vTemp,v[i],center); vec_rotate(vTemp,vector(angle,0,0)); vec_add(vTemp,center); vf[i].x = vTemp.x; vf[i].y = vTemp.y; vf[i].z = 0; } angle += 10*time_step; // open the scene and get the active D3D device LPDIRECT3DDEVICE9 pd3dDev = (LPDIRECT3DDEVICE9)draw_begin(); if (!pd3dDev) return; // set some render and stage states pd3dDev->SetRenderState(D3DRS_ALPHABLENDENABLE,FALSE); pd3dDev->SetTextureStageState(0,D3DTSS_COLORARG2,D3DTA_DIFFUSE); pd3dDev->SetTextureStageState(0,D3DTSS_COLOROP,D3DTOP_SELECTARG2); // now draw the triangle pd3dDev->SetFVF(D3DFVF_FLAT); pd3dDev->DrawPrimitiveUP(D3DPT_TRIANGLEFAN,1,(LPVOID)vf,sizeof(VERTEX_FLAT)); wait(1); } }