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Routines |
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Gives a sparkle its speeds in X and Y and picks one of its sparkle graphics at random. There are four entry points, one for each combination of the speeds 4 and 252. They load L with the X speed and H with the Y speed and carry on at SetSparkleSpeed_Store.
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| SetSparkleSpeed | 46483 | LD HL,1276 | Set the X speed to 252 and the Y speed to 4. | |||||
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Store the speeds and pick the graphic.
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| SetSparkleSpeed_Store | 46486 | LD (IX+9),L | Store the X speed in the object. | |||||
| 46489 | LD (IX+10),H | Store the Y speed in the object. | ||||||
| 46492 | LD A,(23461) | Fetch the second random seed from RandomSeed2. | ||||||
| 46495 | AND %00000011 | Keep the lowest two bits to get a random number from 0 to 3. | ||||||
| 46497 | JR NZ,SetSparkleSpeed_Graphic | Jump to SetSparkleSpeed_Graphic if it is not zero. | ||||||
| 46499 | INC A | Make zero into one. | ||||||
| SetSparkleSpeed_Graphic | 46500 | ADD A,130 | Add 130 to get one of the three sparkle graphic numbers. | |||||
| 46502 | LD (IX+0),A | Store it as the graphic number of the object. | ||||||
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This entry point is used by the routine at SendSparkleAtPlayer.
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| SetSparkleSpeed_Move | 46505 | LD A,(IX+3) | Fetch the height of the sparkle. | |||||
| 46508 | LD (23493),A | Store it, so that the sound of rising blocks can use it at SparkleHeight. | ||||||
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This entry point is used by the routines at HandleBlockMovingEastWest and HandleBlock.
Move the object by its speeds, applying gravity, and flag it to be redrawn.
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| MoveAndDrawObject | 46511 | CALL ApplyGravityAndMove | Update the position of the object. | |||||
| 46514 | JP SetWipeAndDrawFlags | Flag the object to be wiped and drawn again. | ||||||
| SetSparkleSpeed_PositivePositive | 46517 | LD HL,1028 | Set the X speed to 4 and the Y speed to 4. | |||||
| 46520 | JR SetSparkleSpeed_Store | Jump to SetSparkleSpeed_Store. | ||||||
| SetSparkleSpeed_NegativeNegative | 46522 | LD HL,64764 | Set the X speed to 252 and the Y speed to 252. | |||||
| 46525 | JR SetSparkleSpeed_Store | Jump to SetSparkleSpeed_Store. | ||||||
| SetSparkleSpeed_NegativePositive | 46527 | LD HL,64516 | Set the X speed to 4 and the Y speed to 252. | |||||
| 46530 | JR SetSparkleSpeed_Store | Jump to SetSparkleSpeed_Store. | ||||||
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