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Continue matrices

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This commit is contained in:
Miloslav Číž 2018-11-21 17:10:38 +01:00
parent 9eccbe986a
commit 8932e333b6
1 changed files with 25 additions and 31 deletions
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56
s3l.h
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@ -263,7 +263,7 @@ static inline void S3L_makeTranslationMat(S3L_Unit offsetX, S3L_Unit offsetY,
typedef struct
{
S3L_Vec4 offset;
S3L_Vec4 translation;
S3L_Vec4 rotation; /**< Euler angles. Rortation is applied in this order:
1. z = around z (roll) CW looking along z+
2. x = around x (pitch) CW looking along x+
@ -273,7 +273,7 @@ typedef struct
static inline void S3L_initTransoform3D(S3L_Transform3D *t)
{
S3L_initVec4(&(t->offset));
S3L_initVec4(&(t->translation));
S3L_initVec4(&(t->rotation));
t->scale.x = S3L_FRACTIONS_PER_UNIT;
t->scale.y = S3L_FRACTIONS_PER_UNIT;
@ -797,37 +797,24 @@ static inline void S3L_rotate2DPoint(S3L_Unit *x, S3L_Unit *y, S3L_Unit angle)
(angleCos * (*y)) / S3L_FRACTIONS_PER_UNIT;
}
// FIXME: rewrite this to just apply one matrix, EFFICIENCY!!!
static inline void S3L_mapModelToWorld(S3L_Vec4 point,
S3L_Transform3D *modelTransform, S3L_Vec4 *newPoint)
void S3L_makeWorldMatrix(S3L_Transform3D worldTransform, S3L_Mat4 *m)
{
newPoint->x = point.x;
newPoint->y = point.y;
newPoint->z = point.z;
S3L_rotate2DPoint(&(newPoint->x),&(newPoint->y),modelTransform->rotation.z);
S3L_rotate2DPoint(&(newPoint->z),&(newPoint->y),modelTransform->rotation.x);
S3L_rotate2DPoint(&(newPoint->z),&(newPoint->x),modelTransform->rotation.y);
newPoint->x += modelTransform->offset.x;
newPoint->y += modelTransform->offset.y;
newPoint->z += modelTransform->offset.z;
S3L_makeTranslationMat(
worldTransform.translation.x,
worldTransform.translation.y,
worldTransform.translation.z,
m);
}
static inline void S3L_mapWorldToCamera(S3L_Vec4 point,
S3L_Transform3D *cameraTransform, S3L_Vec4 *newPoint)
void S3L_makeCameraMatrix(S3L_Transform3D cameraTransform, S3L_Mat4 *m)
{
newPoint->x = point.x - cameraTransform->offset.x;
newPoint->y = point.y - cameraTransform->offset.y;
newPoint->z = point.z - cameraTransform->offset.z;
S3L_makeTranslationMat(
-1 * cameraTransform.translation.x,
-1 * cameraTransform.translation.y,
-1 * cameraTransform.translation.z,
m);
}
static inline void S3L_mapCameraToScreen(S3L_Vec4 point, S3L_Camera *camera,
S3L_ScreenCoord *screenX, S3L_ScreenCoord *screenY)
{
@ -851,9 +838,17 @@ void S3L_drawModel(
S3L_Index coordIndex = 0;
S3L_ScreenCoord sX0, sY0, sX1, sY1, sX2, sY2;
S3L_Vec4 pointModel, pointWorld, pointCamera;
S3L_Vec4 pointModel;
S3L_Unit indexIndex;
pointModel.w = S3L_FRACTIONS_PER_UNIT; // has to be "1.0" for translation
S3L_Mat4 mat1, mat2;
S3L_makeWorldMatrix(modelTransform,&mat1);
S3L_makeCameraMatrix(camera.transform,&mat2);
S3L_mat4Xmat4(&mat1,&mat2);
while (triangleIndex < triangleCount)
{
#define mapCoords(n)\
@ -864,9 +859,8 @@ void S3L_drawModel(
++indexIndex;\
pointModel.z = coords[indexIndex];\
++coordIndex;\
S3L_mapModelToWorld(pointModel,&modelTransform,&pointWorld);\
S3L_mapWorldToCamera(pointWorld,&camera.transform,&pointCamera);\
S3L_mapCameraToScreen(pointCamera,&camera,&sX##n,&sY##n);
S3L_vec4Xmat4(&pointModel,&mat1);\
S3L_mapCameraToScreen(pointModel,&camera,&sX##n,&sY##n);
mapCoords(0)
mapCoords(1)