From d6a6ea74af14c4c0efd520e84e3007833d624bda Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= Date: Thu, 13 Jun 2019 23:30:04 +0200 Subject: [PATCH] Start offline program --- programs/hqOffline.c | 205 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 programs/hqOffline.c diff --git a/programs/hqOffline.c b/programs/hqOffline.c new file mode 100644 index 0000000..28047dd --- /dev/null +++ b/programs/hqOffline.c @@ -0,0 +1,205 @@ +#define S3L_RESOLUTION_X 1280 +#define S3L_RESOLUTION_Y 1024 + +#define S3L_PIXEL_FUNCTION drawPixel + +#define S3L_SORT 0 +#define S3L_Z_BUFFER 1 + +#include "../small3dlib.h" +#include + +uint8_t frameBuffer[S3L_RESOLUTION_X * S3L_RESOLUTION_Y * 3]; + +#define GRID_W 16 +#define GRID_H 16 + +int8_t heightMap[GRID_W * GRID_H] = +{ + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,1,0,0,1,1,1,0,0,0,0,0, + 0,0,0,0,0,1,0,1,3,3,1,1,0,0,0,0, + 0,0,0,1,1,1,1,3,3,4,2,1,1,0,0,0, + 0,0,0,0,1,1,3,4,4,6,5,2,1,1,0,0, + 0,0,1,2,2,3,4,4,4,6,6,4,3,1,0,0, + 0,1,2,4,5,5,6,6,6,6,6,5,5,3,1,0, + 0,0,2,4,6,7,8,7,7,6,6,6,6,6,2,0, + 0,0,3,4,7,8,8,9,8,7,6,6,6,6,2,0, + 0,0,0,2,4,7,7,7,7,6,6,6,4,3,0,0, + 0,0,0,1,3,6,6,6,6,6,6,6,2,0,0,0, + 0,0,0,0,3,6,6,6,6,6,6,2,0,0,0,0, + 0,0,0,1,1,2,3,5,5,5,2,0,0,0,0,0, + 0,0,1,2,0,0,2,4,4,2,2,0,0,0,0,0, + 0,0,0,0,0,0,1,3,3,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 +}; + +#define GRID_TRIANGLES ((GRID_W - 1) * (GRID_H - 1) * 2) + +S3L_Unit terrainVertices[GRID_W * GRID_H * 3]; +S3L_Index terrainTriangles[GRID_TRIANGLES * 3]; +S3L_Unit terrainNormals[GRID_W * GRID_H * 3]; + +#define MODELS 1 + +S3L_Model3D models[MODELS]; +S3L_Scene scene; + +int previousTriangle = -1; + +S3L_Vec4 lightDirection; + +S3L_Vec4 n0, n1, n2; + +void drawPixel(S3L_PixelInfo *p) +{ + if (p->triangleIndex != previousTriangle) + { + int index = scene.models[p->modelIndex].triangles[p->triangleIndex * 3] * 3; + + n0.x = terrainNormals[index]; + index++; + n0.y = terrainNormals[index]; + index++; + n0.z = terrainNormals[index]; + + index = scene.models[p->modelIndex].triangles[p->triangleIndex * 3 + 1] * 3; + + n1.x = terrainNormals[index]; + index++; + n1.y = terrainNormals[index]; + index++; + n1.z = terrainNormals[index]; + + index = scene.models[p->modelIndex].triangles[p->triangleIndex * 3 + 2] * 3; + + n2.x = terrainNormals[index]; + index++; + n2.y = terrainNormals[index]; + index++; + n2.z = terrainNormals[index]; + } + + S3L_Vec4 normal; + + normal.x = S3L_interpolateBarycentric(n0.x, n1.x, n2.x, + p->barycentric[0], p->barycentric[1], p->barycentric[2]); + + normal.y = S3L_interpolateBarycentric(n0.y, n1.y, n2.y, + p->barycentric[0], p->barycentric[1], p->barycentric[2]); + + normal.z = S3L_interpolateBarycentric(n0.z, n1.z, n2.z, + p->barycentric[0], p->barycentric[1], p->barycentric[2]); + + S3L_normalizeVec3(&normal); + + + uint8_t light = 127 - 127 * (S3L_dotProductVec3(lightDirection,normal) / ((float) S3L_FRACTIONS_PER_UNIT)); + + uint8_t color[3]; + + color[0] = light; + color[1] = S3L_clamp(p->depth / 64,0,255); + color[2] = light; + + int index = (p->y * S3L_RESOLUTION_X + p->x) * 3; + + frameBuffer[index] = color[0]; + frameBuffer[index + 1] = color[1]; + frameBuffer[index + 2] = color[2]; +} + +void createGeometry() +{ + int i = 0; + + for (int y = 0; y < GRID_H; ++y) + for (int x = 0; x < GRID_W; ++x) + { + terrainVertices[i] = (x - GRID_W / 2) * S3L_FRACTIONS_PER_UNIT; + terrainVertices[i + 1] = heightMap[i / 3] * S3L_FRACTIONS_PER_UNIT / 4; + terrainVertices[i + 2] = (y - GRID_H / 2) * S3L_FRACTIONS_PER_UNIT; + i += 3; + } + + i = 0; + + for (int y = 0; y < GRID_H - 1; ++y) + for (int x = 0; x < GRID_W - 1; ++x) + { + S3L_Index indices[4]; + + indices[0] = y * GRID_W + x; + indices[1] = indices[0] + 1; + indices[2] = indices[0] + GRID_W; + indices[3] = indices[2] + 1; + + terrainTriangles[i + 0] = indices[0]; + terrainTriangles[i + 1] = indices[1]; + terrainTriangles[i + 2] = indices[2]; + + terrainTriangles[i + 3] = indices[2]; + terrainTriangles[i + 4] = indices[1]; + terrainTriangles[i + 5] = indices[3]; + + i += 6; + } +} + +void clearFrameBuffer() +{ + memset(frameBuffer,0,S3L_RESOLUTION_X * S3L_RESOLUTION_Y * 3 * sizeof(uint8_t)); +} + +void saveImage(char *fileName) +{ + printf("saving image file: %s",fileName); + + FILE *f = fopen(fileName,"w"); + + fprintf(f,"P3\n%d %d\n255\n",S3L_RESOLUTION_X,S3L_RESOLUTION_Y); + + for (int i = 0; i < S3L_RESOLUTION_X * S3L_RESOLUTION_Y * 3; i += 3) + fprintf(f,"%d %d %d\n",frameBuffer[i],frameBuffer[i + 1],frameBuffer[i + 2]); + + fclose(f); +} + +int main() +{ + createGeometry(); + + lightDirection.x = 10; + lightDirection.y = 10; + lightDirection.z = 10; + lightDirection.w = 0; + + S3L_normalizeVec3(&lightDirection); + + S3L_initModel3D( + terrainVertices, + GRID_W * GRID_H, + terrainTriangles, + GRID_TRIANGLES, + &(models[MODELS - 1])); + + S3L_computeModelNormals(models[MODELS - 1],terrainNormals,0); + + S3L_initScene(models,MODELS,&scene); + + scene.camera.transform.translation.x = 4 * S3L_FRACTIONS_PER_UNIT; + scene.camera.transform.translation.y = 6 * S3L_FRACTIONS_PER_UNIT; + scene.camera.transform.translation.z = -7 * S3L_FRACTIONS_PER_UNIT; + scene.camera.transform.rotation.x = -S3L_FRACTIONS_PER_UNIT / 8; + scene.camera.transform.rotation.y = -S3L_FRACTIONS_PER_UNIT / 8; + + clearFrameBuffer(); + + S3L_newFrame(); + + S3L_drawScene(scene); + + saveImage("test.ppm"); + + return 0; +}