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Add model transform

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This commit is contained in:
Miloslav Číž 2018-11-20 13:08:23 +01:00
parent 360df9fe83
commit 4f14e1e1cb
1 changed files with 23 additions and 11 deletions
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34
s3l.h
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@ -284,7 +284,8 @@ void S3L_drawTriangle(
S3L_ScreenCoord x0, S3L_ScreenCoord y0,
S3L_ScreenCoord x1, S3L_ScreenCoord y1,
S3L_ScreenCoord x2, S3L_ScreenCoord y2,
S3L_DrawConfig config)
S3L_DrawConfig config,
S3L_Index triangleID)
{
if (config.backfaceCulling != S3L_BACKFACE_CULLING_NONE)
{
@ -298,6 +299,7 @@ void S3L_drawTriangle(
S3L_PixelInfo p;
S3L_initPixelInfo(&p);
p.triangleID = triangleID;
// point mode
@ -555,6 +557,14 @@ void S3L_drawTriangle(
#undef stepSide
}
static inline void S3L_mapModelToWorld(S3L_Vec3 point,
S3L_Transform3D *modelTransform, S3L_Vec3 *newPoint)
{
newPoint->x = point.x + modelTransform->offset.x;
newPoint->y = point.y + modelTransform->offset.y;
newPoint->z = point.z + modelTransform->offset.z;
}
static inline void S3L_mapWorldToCamera(S3L_Vec3 point,
S3L_Transform3D *cameraTransform, S3L_Vec3 *newPoint)
{
@ -578,34 +588,36 @@ void S3L_drawModel(
const S3L_Unit coords[],
const S3L_Index triangleVertexIndices[],
uint16_t triangleCount,
S3L_Transform3D modelTransform,
S3L_Camera camera,
S3L_DrawConfig config)
{
S3L_Index triangleIndex = 0;
S3L_Index coordIndex = 0;
S3L_ScreenCoord sX0, sY0, sX1, sY1, sX2, sY2;
S3L_Vec3 pointModel, pointWorld, pointCamera;
S3L_Unit indexIndex;
while (triangleIndex < triangleCount)
{
S3L_ScreenCoord sX0, sY0, sX1, sY1, sX2, sY2;
S3L_Vec3 point, point2;
S3L_Unit indexIndex;
#define mapCoords(n)\
indexIndex = triangleVertexIndices[coordIndex] * 3;\
point.x = coords[indexIndex];\
pointModel.x = coords[indexIndex];\
++indexIndex; /* TODO: put into square brackets? */\
point.y = coords[indexIndex];\
pointModel.y = coords[indexIndex];\
++indexIndex;\
point.z = coords[indexIndex];\
pointModel.z = coords[indexIndex];\
++coordIndex;\
S3L_mapWorldToCamera(point,&camera.transform,&point2);\
S3L_mapCameraToScreen(point2,&camera,&sX##n,&sY##n);
S3L_mapModelToWorld(pointModel,&modelTransform,&pointWorld);\
S3L_mapWorldToCamera(pointWorld,&camera.transform,&pointCamera);\
S3L_mapCameraToScreen(pointCamera,&camera,&sX##n,&sY##n);
mapCoords(0)
mapCoords(1)
mapCoords(2)
S3L_drawTriangle(sX0,sY0,sX1,sY1,sX2,sY2,config);
S3L_drawTriangle(sX0,sY0,sX1,sY1,sX2,sY2,config,triangleIndex);
++triangleIndex;
}