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libnds
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/******************************************************************************************** * Nehe lesson 10 modification which uses the touch screen to control the camera and dpad * to move the player. * Author: revo * * Updated by revo (from 10b) - added camera moving by touching touch screen * ********************************************************************************************/ #include <nds.h> #include <malloc.h> #include <stdio.h> #include "Mud_pcx.h" #include "World_txt.h" int DrawGLScene(); int heading; int32 xpos; int32 zpos; int yrot; // Y Rotation int32 walkbias = 0; int walkbiasangle = 0; int lookupdown = 0; int texture[1]; // Storage For 1 Textures (only going to use 1 on the DS for this demo) typedef struct tagVERTEX { v16 x, y, z; t16 u, v; } VERTEX; typedef struct tagTRIANGLE { VERTEX vertex[3]; } TRIANGLE; typedef struct tagSECTOR { int numtriangles; TRIANGLE* triangle; } SECTOR; SECTOR sector1; // Our Model Goes Here: u8* file = (u8*)World_txt; void myGetStr(char* buff, int size) { *buff = *file++; while( (*buff != '\n') && (*buff != 0xD)) { buff++; *buff = *file++; } buff[0] = '\n'; buff[1] = 0; } void readstr(char *string) { do { myGetStr(string, 255); } while ((string[0] == '/') || (string[0] == '\n' )); } void SetupWorld() { float x, y, z; float u, v; int numtriangles; char oneline[255]; readstr(oneline); sscanf(oneline, "NUMPOLLIES %d\n", &numtriangles); sector1.triangle = (TRIANGLE*)malloc(numtriangles*sizeof(TRIANGLE)); sector1.numtriangles = numtriangles; for (int loop = 0; loop < numtriangles; loop++) { for (int vert = 0; vert < 3; vert++) { readstr(oneline); sscanf(oneline, "%f %f %f %f %f", &x, &y, &z, &u, &v); sector1.triangle[loop].vertex[vert].x = floattov16(x); sector1.triangle[loop].vertex[vert].y = floattov16(y); sector1.triangle[loop].vertex[vert].z = floattov16(z); sector1.triangle[loop].vertex[vert].u = floattot16(u*128); sector1.triangle[loop].vertex[vert].v = floattot16(v*128); } } return; } // Load PCX files And Convert To Textures int LoadGLTextures() { sImage pcx; //load our texture loadPCX((u8*)Mud_pcx, &pcx); image8to16(&pcx); glGenTextures(1, &texture[0]); glBindTexture(0, texture[0]); glTexImage2D(0, 0, GL_RGB, TEXTURE_SIZE_128 , TEXTURE_SIZE_128, 0, TEXGEN_TEXCOORD | GL_TEXTURE_WRAP_S | GL_TEXTURE_WRAP_T, pcx.image.data8); imageDestroy(&pcx); return TRUE; } int main() { // Setup the Main screen for 3D videoSetMode(MODE_0_3D); vramSetBankA(VRAM_A_TEXTURE); //NEW must set up some memory for textures // initialize the 3D engine glInit(); // enable textures glEnable(GL_TEXTURE_2D); // Set our viewport to be the same size as the screen glViewport(0,0,255,191); // setup the projection matrix glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(70, 256.0 / 192.0, 0.1, 100); glLight(0, RGB15(31,31,31) , 0, floattov10(-1.0), 0); //need to set up some material properties since DS does not have them set by default glMaterialf(GL_AMBIENT, RGB15(16,16,16)); glMaterialf(GL_DIFFUSE, RGB15(16,16,16)); glMaterialf(GL_SPECULAR, BIT(15) | RGB15(8,8,8)); glMaterialf(GL_EMISSION, RGB15(16,16,16)); //ds uses a table for shinyness..this generates a half-ass one glMaterialShinyness(); //ds specific, several attributes can be set here glPolyFmt(POLY_ALPHA(31) | POLY_CULL_NONE | POLY_FORMAT_LIGHT0); // Set the current matrix to be the model matrix glMatrixMode(GL_MODELVIEW); // Specify the Clear Color and Depth glClearColor(0,0,0,31); glClearDepth(0x7FFF); // set the vertex color to white glColor3f(1.0,1.0,1.0); LoadGLTextures(); SetupWorld(); touchPosition thisXY; touchPosition lastXY = { 0,0,0,0 }; while (1) { //these little button functions are pretty handy scanKeys(); if (keysHeld() & (KEY_LEFT|KEY_Y)) { xpos -= sinLerp(heading + degreesToAngle(90)) >> 5; zpos += cosLerp(heading + degreesToAngle(90)) >> 5; } if (keysHeld() & (KEY_RIGHT|KEY_A)) { xpos += sinLerp(heading + degreesToAngle(90)) >> 5; zpos -= cosLerp(heading + degreesToAngle(90)) >> 5; } if (keysHeld() & (KEY_DOWN|KEY_B)) { xpos -= sinLerp(heading)>>5; zpos += cosLerp(heading)>>5; walkbiasangle += degreesToAngle(5); walkbias = sinLerp(walkbiasangle)>>4; } if (keysHeld() & (KEY_UP|KEY_X)) { xpos += sinLerp(heading) >> 5; zpos -= cosLerp(heading) >> 5; if (walkbiasangle <= 0) { walkbiasangle = DEGREES_IN_CIRCLE; } else { walkbiasangle -= degreesToAngle(5); } walkbias = sinLerp(walkbiasangle)>>4; } // Camera rotation by touch screen if (keysHeld() & KEY_TOUCH) { touchRead(&thisXY); int16 dx = thisXY.px - lastXY.px; int16 dy = thisXY.py - lastXY.py; // filtering measurement errors if (dx<20 && dx>-20 && dy<20 && dy>-20) { if(dx>-3&&dx<3) dx=0; if(dy>-2&&dy<2) dy=0; lookupdown -= degreesToAngle(dy); heading += degreesToAngle(dx); yrot = heading; } lastXY = thisXY; } //Push our original Matrix onto the stack (save state) glPushMatrix(); DrawGLScene(); // Pop our Matrix from the stack (restore state) glPopMatrix(1); // flush to screen glFlush(0); } return 0; } int DrawGLScene() // Here's Where We Do All The Drawing { // Reset The View v16 x_m, y_m, z_m; t16 u_m, v_m; int32 xtrans = -xpos; int32 ztrans = -zpos; int32 ytrans = -walkbias-(1<<10); int sceneroty = DEGREES_IN_CIRCLE - yrot; glLoadIdentity(); int numtriangles; glRotatef32i(lookupdown,(1<<12),0,0); glRotatef32i(sceneroty,0,(1<<12),0); glTranslatef32(xtrans, ytrans, ztrans); glBindTexture(GL_TEXTURE_2D, texture[0]); numtriangles = sector1.numtriangles; // Process Each Triangle for (int loop_m = 0; loop_m < numtriangles; loop_m++) { glBegin(GL_TRIANGLES); glNormal(NORMAL_PACK( 0, 0, 1<<10)); x_m = sector1.triangle[loop_m].vertex[0].x; y_m = sector1.triangle[loop_m].vertex[0].y; z_m = sector1.triangle[loop_m].vertex[0].z; u_m = sector1.triangle[loop_m].vertex[0].u; v_m = sector1.triangle[loop_m].vertex[0].v; glTexCoord2t16(u_m,v_m); glVertex3v16(x_m,y_m,z_m); x_m = sector1.triangle[loop_m].vertex[1].x; y_m = sector1.triangle[loop_m].vertex[1].y; z_m = sector1.triangle[loop_m].vertex[1].z; u_m = sector1.triangle[loop_m].vertex[1].u; v_m = sector1.triangle[loop_m].vertex[1].v; glTexCoord2t16(u_m,v_m); glVertex3v16(x_m,y_m,z_m); x_m = sector1.triangle[loop_m].vertex[2].x; y_m = sector1.triangle[loop_m].vertex[2].y; z_m = sector1.triangle[loop_m].vertex[2].z; u_m = sector1.triangle[loop_m].vertex[2].u; v_m = sector1.triangle[loop_m].vertex[2].v; glTexCoord2t16(u_m,v_m); glVertex3v16(x_m,y_m,z_m); glEnd(); } return TRUE; // Everything Went OK }
1.7.3
